dicyclopentadiene

H225: Highly Flammable liquid and vapor [Danger Flammable liquids]

H302: Harmful if swallowed [Warning Acute toxicity, oral]

H315: Causes skin irritation [Warning Skin corrosion/irritation]

H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H332: Harmful if inhaled [Warning Acute toxicity, inhalation]

H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P270, P271, P273, P280, P301+P317, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P370+P378, P391, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

H225 (74%): Highly Flammable liquid and vapor [Danger Flammable liquids]

H226 (15.8%): Flammable liquid and vapor [Warning Flammable liquids]

H228 (10.3%): Flammable solid [Danger Flammable solids]

H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]

H304 (21.3%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]

H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]

H317 (10.3%): May cause an allergic skin reaction [Warning Sensitization, Skin]

H319 (99.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H330 (46.7%): Fatal if inhaled [Danger Acute toxicity, inhalation]

H332 (48.4%): Harmful if inhaled [Warning Acute toxicity, inhalation]

H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

H361 (20.5%): Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]

H361d (10.8%): Suspected of damaging the unborn child [Warning Reproductive toxicity]

H373 (31.3%): May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

H400 (31.3%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]

H411 (100%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

P203, P210, P233, P240, P241, P242, P243, P260, P261, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P301+P317, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P316, P317, P318, P319, P320, P321, P330, P331, P332+P317, P333+P317, P337+P317, P362+P364, P370+P378, P391, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 964 reports by companies from 35 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]

H304 (100%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]

H351 (100%): Suspected of causing cancer [Warning Carcinogenicity]

H361 (100%): Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]

H412 (100%): Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

P203, P210, P233, P240, P241, P242, P243, P264, P273, P280, P301+P316, P302+P352, P303+P361+P353, P318, P321, P331, P332+P317, P362+P364, P370+P378, P403+P235, P405, and P501 (click each P-code to see the statement)

The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory.

H226: Flammable liquid and vapor [Warning Flammable liquids]

H320: Causes eye irritation [Warning Serious eye damage/eye irritation]

H330: Fatal if inhaled [Danger Acute toxicity, inhalation]

H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]

H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]

H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]

Fresh air, rest.

Remove contaminated clothes. Rinse and then wash skin with water and soap.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth. Refer for medical attention .

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

General First Aid:

· Call 911 or emergency medical service.

· Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination.

· Move victim to fresh air if it can be done safely.

· Administer oxygen if breathing is difficult.

· If victim is not breathing:

-- DO NOT perform mouth-to-mouth resuscitation; the victim may have ingested or inhaled the substance.

-- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped with a one-way valve or other device).

-- If no pulse detected or no respiratory medical device available, provide continuous compressions. Conduct a pulse check every two minutes or monitor for any signs of spontaneous respirations.

· Remove and isolate contaminated clothing and shoes.

· For minor skin contact, avoid spreading material on unaffected skin.

· In case of contact with substance, remove immediately by flushing skin or eyes with running water for at least 20 minutes.

· For severe burns, immediate medical attention is required.

· Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed.

· Keep victim calm and warm.

· Keep victim under observation.

· For further assistance, contact your local Poison Control Center.

· Note: Basic Life Support (BLS) and Advanced Life Support (ALS) should be done by trained professionals.

Specific First Aid:

· Wash skin with soap and water.

· In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin.

(General first aid procedures)

Eye: Irrigate immediately - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.

Skin: Soap flush immediately - If this chemical contacts the skin, immediately flush the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. If irritation persists after washing, get medical attention.

Breathing: Respiratory support

Swallow: Medical attention immediately - If this chemical has been swallowed, get medical attention immediately.

Excerpt from ERG Guide 130 [Flammable Liquids (Water-Immiscible / Noxious); polymerization hazard]:

CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient.

SMALL FIRE: Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.

LARGE FIRE: Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam. Avoid aiming straight or solid streams directly onto the product. If it can be done safely, move undamaged containers away from the area around the fire.

FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2024)

Use water in large amounts, foam, carbon dioxide, powder. In case of fire: keep drums, etc., cool by spraying with water.

Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.

Advice for firefighters: Wear self-contained breathing apparatus for firefighting if necessary.

Use water spray to cool unopened containers.

Evacuation: If fire becomes uncontrollable or container is exposed to direct flame - consider evacuation of one-third (1/3) mile radius.

For more Fire Fighting Procedures (Complete) data for DICYCLOPENTADIENE (8 total), please visit the HSDB record page.

Poisonous gases are produced in fire.

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· Keep unauthorized personnel away.

· Stay upwind, uphill and/or upstream.

· Ventilate closed spaces before entering, but only if properly trained and equipped.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

· All equipment used when handling the product must be grounded.

· Do not touch or walk through spilled material.

· Stop leak if you can do it without risk.

· Prevent entry into waterways, sewers, basements or confined areas.

· A vapor-suppressing foam may be used to reduce vapors.

· Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.

· Use clean, non-sparking tools to collect absorbed material.

Large Spill

· Dike far ahead of liquid spill for later disposal.

· Water spray may reduce vapor, but may not prevent ignition in closed spaces.

Excerpt from ERG Guide 130 [Flammable Liquids (Water-Immiscible / Noxious); polymerization hazard]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.

LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Immediate precautionary measure

· Isolate spill or leak area for at least 50 meters (150 feet) in all directions.

· Consider initial downwind evacuation for at least 300 meters (1000 feet).

· If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

Remove all ignition sources. Personal protection: filter respirator for organic gases and particulates adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered sealable containers. Then store and dispose of according to local regulations.

ACCIDENTAL RELEASE MEASURES: Personal precautions, protective equipment and emergency procedures: Wear respiratory protection. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Remove all sources of ignition. Evacuate personnel to safe areas. Beware of vapors accumulating to form explosive concentrations. Vapors can accumulate in low areas; Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided; Methods and materials for containment and cleaning up: Contain spillage, and then collect with an electrically protected vacuum cleaner or by wet-brushing and place in container for disposal according to local regulations.

Powders and dusts: Evacuate persons not wearing protective equipment from area of spill or leak until cleanup is complete. Remove all ignition sources. Collect powdered material in the most convenient and safe manner and deposit in sealed containers. Ventilate area after cleanup is complete. It may be necessary to contain and dispose of this chemical as a hazardous waste. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters. ... Liquid: Evacuate and restrict persons not wearing protective equipment from area of spill or leak until cleanup is complete. Remove all ignition sources. Establish forced ventilation to keep levels below explosive limit. Absorb liquids in vermiculite, dry sand, earth, peat, carbon, or a similar material and deposit in sealed containers. Keep this chemical out of a confined space, such as a sewer, because of the possibility of an explosion, unless the sewer is designed to prevent the buildup of explosive concentrations. It may be necessary to contain and dispose of this chemical as a hazardous waste. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters.

Remove all ignition sources. Personal protection: A/P2 filter respirator for organic vapor and harmful dust. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers, then remove to safe place.

Collect with a brush onto a paper sheet. Place in an iron pan in hood. Burn the paper.

SRP: Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in air, soil or water; effects on animal, aquatic and plant life; and conformance with environmental and public health regulations. If it is possible or reasonable use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination.

Product: Burn in a chemical incinerator equipped with an afterburner and scrubber but exert extra care in igniting as this material is highly flammable. Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this material; Contaminated packaging: Dispose of as unused product.

SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

For more Disposal Methods (Complete) data for DICYCLOPENTADIENE (6 total), please visit the HSDB record page.

Precautions for safe handling: Avoid contact with skin and eyes. Avoid inhalation of vapor or mist. Keep away from sources of ignition - No smoking. Take measures to prevent the build up of electrostatic charge.

Appropriate engineering controls: Avoid contact with skin, eyes and clothing. Wash hands before breaks and immediately after handling the product.

Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands.

If material not on fire and not involved in fire: Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water to knock down vapors.

For more Preventive Measures (Complete) data for DICYCLOPENTADIENE (12 total), please visit the HSDB record page.

Excerpt from ERG Guide 130 [Flammable Liquids (Water-Immiscible / Noxious); polymerization hazard]:

ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.

LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2024)

Store only if stabilized. Store in an area without drain or sewer access. Fireproof. Cool. Keep in the dark. Separated from strong oxidants.

Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage.

Store in a flammable liquid storage area or approved cabinet away from ignition sources and corrosive and reactive materials. May form peroxides in storage. ... Before entering a confined space where this chemical may be present, check to make sure that an explosive concentration does not exist. Store in tightly closed containers in a cool, well-ventilated area away from oxidizing materials, strong acids, and strong bases. Sources of ignition, such as smoking and open flames, are prohibited where this chemical is used, handled, or stored in a manner that could create a potential fire or explosion hazard. Metal containers involving the transfer of 5 gallons or more of this chemical should be grounded and bonded. Drums must be equipped with self-closing valves, pressure vacuum bungs, and flame arresters. Use only nonsparking tools and equipment, especially when opening and closing containers of this chemical.

/Dicyclopentadiene/ must be inhibited and maintained under an inert atmosphere to prevent polymerization.

Store only if stabilized. Store in an area without drain or sewer access. Fireproof. Cool. Keep in the dark. Separated from strong oxidants ...

· Wear positive pressure self-contained breathing apparatus (SCBA).

· Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.

0.5 [ppm]

0.010 [ppm]

5.0 [ppm]

75 [ppm]

5 ppm (30 mg/m³)

TWA 5 ppm (30 mg/m3)

none See Appendix G

See: IDLH INDEX

1.0 [ppm]

8 hr Time Weighted Avg (TWA): 5 ppm.

Excursion Limit Recommendation: Excursions in worker exposure levels may exceed 3 times the TLV-TWA for no more than a total of 30 minutes during a work day, and under no circumstances should they exceed 5 times the TLV-TWA, provided that the TLV-TWA is not exceeded.

0,5 ppm as TWA; 1 ppm as STEL.

0.5 ppm [2018]

1 ppm [2018]

2.7 mg/m

CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient.

Small Fire

· Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.

Large Fire

· Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.

· Avoid aiming straight or solid streams directly onto the product.

· If it can be done safely, move undamaged containers away from the area around the fire.

Fire Involving Tanks, Rail Tank Cars or Highway Tanks

· Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles.

· Cool containers with flooding quantities of water until well after fire is out.

· Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.

· ALWAYS stay away from tanks in direct contact with flames.

· For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

ERPG-1: 0.01 ppm - one hour exposure limit: 1 = mild transient health effects or objectionable odor [AIHA]

ERPG-2: 5 ppm - one hour exposure limit: 2 = impaired ability to take protective action [AIHA]

ERPG-3: 75 ppm - one hour exposure limit: 3 = life threatening health effects [AIHA]

USSR (1976) AND Bulgaria (1977): 1 mg/cu m or about 0.2 ppm.

Emergency Response Planning Guidlines (ERPGs) for dicyclopentadiene:[Table#1049]

A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20 °C; on spraying or dispersing, however, much faster.

The substance is irritating to the eyes, skin and respiratory tract.

Excerpt from NIOSH Pocket Guide for Dicyclopentadiene:

Skin: PREVENT SKIN CONTACT - Wear appropriate personal protective clothing to prevent skin contact.

Eyes: PREVENT EYE CONTACT - Wear appropriate eye protection to prevent eye contact.

Dicyclopentadiene appears as a liquid with an acrid odor. Flash point 90 °F. The vapors are irritating to the eyes and respiratory system. Subject to polymerization if subjected to heat for prolonged periods or if contaminated. If the polymerization takes place inside a container, the container may violently rupture. Insoluble in water. Density 8.2 lb / gal. Used in paints, varnishes, as an intermediate in insecticides, as a flame retardant in plastics.

Colorless, crystalline solid with a disagreeable, camphor-like odor; Note: A liquid above 90 degrees F; [NIOSH]

COLOURLESS CRYSTALS WITH CHARACTERISTIC ODOUR.

A liquid with an acrid odor.

Colorless, crystalline solid with a disagreeable, camphor-like odor. [Note: A liquid above 90 °F.]

Colorless crystalline solid [Note: A liquid above 90 degrees F]

Disagreeable camphor-like odor

Disagreeable odor similar to that of camphor

Sweet, sharp odor, unpleasant

342 °F at 760 mmHg (NTP, 1992)

166.6 °C @760 [mm Hg]

92.5 °F (NTP, 1992)

32-34 °C

90 °F (NTP, 1992)

24 °C (75 °F)

90 °F (32 °C) (Open cup)

32 °C o.c.

90 °F (open cup)

(oc) 90 °F

Insoluble (NTP, 1992)

In water, 0.020 g/L at 25 °C

Very soluble in ethyl ether, ethanol

Readily sol in acetone, dichloromethane, ethyl acetate, n-hexane, and toluene.

Solubility in water, g/100ml at 25 °C: 0.002

0.978 at 68 °F (USCG, 1999) - Less dense than water; will float

0.9302 g/cu cm at 35 °C

Bulk density = 8.2 lb/gal at 60 °F

Liquid density: 0.978 at 20 °C

0.98 g/cm³

Relative density of the vapour/air-mixture at 20 °C (air = 1): 1.01

0.976 @ 35°C

0.98 (Liquid at 95 °F)

4.55 (NTP, 1992) - Heavier than air; will sink (Relative to Air)

4.55 (Air = 1)

Relative vapor density (air = 1): 4.6-4.7

10 mmHg at 117.7 °F (NTP, 1992)

2.3 [mmHg]

Vapor pressure: 1.40 mm Hg at 20 °C

2.30 mm Hg at 25 °C /Extrapolated from a measured range of 33 °C and higher/

Vapor pressure, Pa at 20 °C: 180

Highly flammable. Insoluble in water.

Conjugated Dienes

Polymerizable Compounds

Highly Flammable

Polymerizable

CSL00088

DICYCLOPENTADIENE

dicyclopentadiene (DCPD) was heated inside a pressure vessel which had been purged with nitrogen gas. When the temperature exceeded 160 C, the vessel exploded.

Flammable,Self-Reactive,Toxic

added by Approver: Dicyclopentadiene is a liquid with an acrid odor. Flash point 90°F. The vapors are irritating to the eyes and respiratory system. Subject to polymerization if subjected to heat for prolonged periods or if contaminated. If the polymerization takes place inside a container, the container may violently rupture.

User-Reported

DICYCLOPENTADIENE may react vigorously with oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. Can undergo exothermic polymierization reactions In the presence of various catalysts (such as acids) or initiators, if subjected to heat for prolonged periods, or if contaminated. Many undergo autoxidation upon exposure to the air to form explosive peroxides.

Incompatible materials: Strong oxidizing agents, Strong acids, Strong bases

Above 32 °C explosive vapor/air mixtures may be formed ... /Dicyclopentadiene/ can form explosive peroxides.

... Can react with oxidizing materials.

Forms explosive mixture with air above flash point. Depolymerizes at boiling point and forms two molecules of cyclopentadiene unless inhibited and maintained under inert atmosphere to prevent polymerization. Violent reaction with strong oxidizers, strong acids, strong bases. Can accumulate static electrical charges, and may cause ignition of its vapors.

For more Hazardous Reactivities and Incompatibilities (Complete) data for DICYCLOPENTADIENE (6 total), please visit the HSDB record page.

Oxidizers [Note: Depolymerizes at boiling point and forms two molecules of cyclopentadiene. Must be inhibited and maintained under an inert atmosphere to prevent polymerization.]

Dicyclopentadiene

B: Compounds that form peroxides on concentration (distillation/evaporation)

1 samples had 3 ppm, age > 1 yr

Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes 1-26. New York, NY: John Wiley and Sons, 1978-1984., p. V7 424 (1979)

Pohanish, R.P. (ed). Sittig's Handbook of Toxic and Hazardous Chemical Carcinogens 6th Edition Volume 1: A-K,Volume 2: L-Z. William Andrew, Waltham, MA 2012, p. 974-5

https://toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@rn+@rel+77-73-6

https://cameochemicals.noaa.gov/chemical/3179

IDENTIFICATION AND USE: Dicyclopentadiene (DCPD) is a colorless crystalline solid (a liquid above 90 degrees F). DCPD is used in the manufacture of cyclopentadiene as a pesticide intermediate; in the production of ferrocene compounds; in paints, varnishes, and resin manufacture; in production of elastomers, resin systems, and polymers. It is also used as a repellent for animals such as hares, rabbits, and deer, in winter or in summer. Applied in the form of impregnated strip on deciduous and coniferous trees, or by spraying around ornamental plants and shrubs. HUMAN EXPOSURE AND TOXICITY: Signs of exposure after inhalation--cough, sore throat, and headache; skin exposure--redness and pain; eyes exposure--redness and pain; Ingestion--abdominal pain, and nausea. Human sensory responses to DCPD were studied in three human volunteers. The odor threshold was reported to be as low as 0.003 ppm. In two of the subjects exposed to 1 and 5.5 ppm for 30 minutes, one subject experienced mild eye and throat irritation after 7 minutes at 1 ppm, and the other subject reported olfactory fatigue after 24 minutes. Eye irritation was reported after 10 minutes, but no olfactory fatigue was reported by either test subject at 5.5 ppm. Accidental exposures of workers, in which headaches were experienced during first 2 months but were not experienced during next 3 months, indicate a certain degree of inurement. ANIMAL STUDIES: In rabbits it was slightly irritating to skin and eyes. Three of four rats survived ten 6-hour daily exposures at 250 ppm, and all survived 15 such exposures at 100 ppm. On daily, repeated exposures to DCPD for 10 days, rats succumbed at the 332 ppm level, but not at the 146 and 72 ppm levels. All dying rats succumbed with convulsions and hemorrhage of the lungs with blood in the intestines; with the females, hemorrhage of the thymus. Mice exposed under the same schedule died at both 146 and 72 ppm. After exposures of 7 hours/day for 89 exposure days, kidney damage was seen in rats exposed at 74 and 35 ppm DCPD. Some lung involvement was seen as chronic pneumonia and bronchiectasis, but no dose related effect was seen in other organs examined. Dogs exposed under the same schedule (89 exposure days) at 32, 23, and 9 ppm DCPD showed only minimal changes in the biochemical tests used, and no changes that were dose-related in 28 organs examined. Hyaline droplets in the proximal convoluted tubular epithelial cells of the kidney were seen in male rats exposed to 5 and 50ppm DCPD and tubular proteinosis was seen by week 13 in all male rats exposed to 50ppm DCPD. Mice were exposed to DCPD by inhalation for 7 hours per day, 5 days per week for 10 days at 47, 72, and 146 ppm. All mice exhibited convulsive deaths on the first day of exposure. Death at 72 ppm occurred in five of six mice of each sex during the 10 days of exposure and was not associated with the convulsions or gross lesions observed in rats. No deaths occurred at 47 ppm and no other effects of treatment were observed. In other study four groups, each consisting of 45 male and 45 female B6C3F1 mice, were exposed to DCPD vapor by inhalation 6 hr/day, 5 days/week, for 13 weeks (64 exposures) at targeted concentrations of 0, 1.0, 5.0, or 50 ppm. Ten male and nine female mice in the highest exposure group died during the study, while no more than two mice died in any other group. 20 female pregnant rats were admin DCPD orally at 0, 80, 250, 750 mg/kg/day for days 6 to 15 gestation. On day 19, the dams were sacrificed and examined; each uterus was examined for implantation sites, placement in uterine horns, number of live and dead fetuses and resorptions. Fetuses were examined for soft tissue changes and skeletal abnormalities. No compound-related gross pathological effects or changes in reproductive performance were seen in the dams. There were no visceral or skeletal malformations or changes in sex ratio in the fetuses. DCPD was not mutagenic in the Salmonella assay at doses of 0, 3, 10, 33, 100, and 333 ug/plate in Salmonella typhimurium strains (TA98, TA100, TA1535, and TA1537) with or without metabolic activation. DCPD did not induce structural chromosomal aberration or polyploidy in CHL/IU cells; negative finding were confirmed in the in vitro micronucleus test.

The substance can be absorbed into the body by inhalation and by ingestion.

inhalation, ingestion, skin and/or eye contact

Cough. Sore throat. Headache.

Redness. Pain.

Abdominal pain. Nausea.

irritation eyes, skin, nose, throat; incoordination, headache; sneezing, cough; skin blisters; In Animals: kidney, lung damage

Eyes, skin, respiratory system, central nervous system, kidneys

Neurotoxin - Acute solvent syndrome

Occupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.

Dicyclopentadiene

8 x 10^-2 mg/kg-day

2 x 10^-1 mg/kg-day

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Inadequate information to assess carcinogenic potential

SCREEN Current

PPRTV Current

LC50 (rat) = 660 ppm/4h

LC50Mice inhalation (6 hr), M: 143 (130 to 157) ppm; F: 130 (103 to 153) ppm. /Approx 97% endo-DCPD and 1% cyclopentadiene/

LC50 Rat inhalation (6 hr), M: 284 (236 to 341) ppm; F: 353 (322 to 387) ppm. /Approx 97% endo-DCPD and 1% cyclopentadiene/

LD50 Cattle (calves) 1200 mg/kg

LD50 Rat oral 590 mg/kg, M = 512 mg/kg; F = 676 mg/kg. /A hydrocarbon mixture containing approx 71% endo dicyclopentadiene/

For more Non-Human Toxicity Values (Complete) data for DICYCLOPENTADIENE (20 total), please visit the HSDB record page.

A retrospective epidemiological study in The Netherlands showed a statistical association between chlorination by-products in drinking water and cancer of the esophagus and stomach for males. A pilot-plant study with alternative disinfectants was carried out with stored water of the Rivers Rhine and Meuse. It was demonstrated that the increase of direct acting mutagens after treatment with chlorine dioxide is similar to the effect of chlorination. Ozonation of Rhine water reduced the mutagenic activity for Salmonella typhimurium TA 98 both with and without metabolic activation. UV alone hardly affects the mutagenicity of the stored river water for S. typhimurium TA 98. In all studies, practically no mutagenic activity for S. typh. TA 100 was found. Although remarkable changes in the concentration of individual organic compounds are reported, the identity of the mutagens detected is yet unclear. Compounds of possible interest due to their removal by ozonation are 1,3,3-trimethyloxindole, dicyclopentadiene and several alkylquinolines. Compounds which might be responsible for the increased mutagenicity after chlorination are two brominated acetonitriles and tri(2-chlorethyl) phosphate. Furthermore, the concentration procedure with adsorption on XAD resin and the subsequent elution step may have affected the results. It is proposed to focus further research more on the less volatile by-products of disinfection than on the trihalomethanes.

An added stabilizer or inhibitor can influence the toxicological properties of /dicyclopentadiene/, consult an expert.

Immediate First Aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention.

Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Anticipate seizures and treat as necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... . Treat frostbite with rapid rewarming techniques ... . /Aliphatic hydrocarbons and related compounds/

Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag-valve-mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start IV administration of D5W TKO /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) or lorazepam (Ativan) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Aliphatic hydrocarbons and related compounds/

... Remove contaminated clothes. Rinse and then wash skin with water and soap ...

/HUMAN EXPOSURE STUDIES/ Human sensory responses to dicyclopentadiene were studied in three human volunteers. The odor threshold was reported as low as 0.003 ppm. In two of the subjects exposed to 1 and 5.5 ppm for 30 minutes, one subject experienced mild eye and throat irritation after 7 minutes at 1 ppm, and the other subject reported olfactory fatigue after 24 minutes. Eye irritation was reported after 10 minutes, but no olfactory fatigue was reported by either test subject at 5.5 ppm.

/HUMAN EXPOSURE STUDIES/ In tests of two subjects to determine human sensory responses to DCPD, one subject experienced mild eye and throat irritation in 7 minutes at 1 ppm and one subject experienced olfactory fatigue in 24 minutes. No fatigue occurred in either subject during a 30-minute exposure at 5.5 ppm. This experiment indicates that olfactory fatigue is not common for DCPD concentrations of 1 and 5.5 ppm.

/SIGNS AND SYMPTOMS/ ACUTE ... SYMPTOMS: Inhalation--cough, sore throat, and headache; Skin--redness and pain; Eyes--redness and pain; Ingestion--abdominal pain, and nausea.

/CASE REPORTS/ Accidental exposures of workers, in which headaches were experienced during first 2 months but were not experienced during next 3 months, indicate a certain degree of inurement.

/LABORATORY ANIMALS: Acute Exposure/ 8-10 wk old calves were given single oral dose of dicyclopentadiene at 250, 500, 1000, or 2000 mg/kg of body wt. Intoxication, ataxia, & excess salivation were observed at 250 mg/kg. At higher dosages, these signs intensified. Calves fell and, while prostrate, exhibited running movement and tonic, clonic spasms. At 2000 mg/kg and 1000 mg/kg, some calves died before 7 days.

/LABORATORY ANIMALS: Acute Exposure/ Slightly irritating to skin and eyes (rabbits)...

/LABORATORY ANIMALS: Acute Exposure/ Dicyclopentadiene rated 2 on rabbit eyes /on a scale of 1 to 10 with 10 being the most severe/.

/LABORATORY ANIMALS: Acute Exposure/ Draize test using guinea pig was ... negative.

For more Non-Human Toxicity Excerpts (Complete) data for DICYCLOPENTADIENE (29 total), please visit the HSDB record page.

EPA has released the Interactive Chemical Safety for Sustainability (iCSS) Dashboard. The iCSS Dashboard provides an interactive tool to explore rapid, automated (or in vitro high-throughput) chemical screening data generated by the Toxicity Forecaster (ToxCast) project and the federal Toxicity Testing in the 21st century (Tox21) collaboration. /The title compound was tested by ToxCast and/or Tox21 assays/[USEPA; ICSS Dashboard Application; Available from, as of December 17, 2015: http://actor.epa.gov/dashboard/]

LC50; Species: Cyprinus carpio (carp); Concentration: 62.2 mg/L for 96 hr /Conditions of bioassay not specified/

LC50; Species: Cyprinus carpio (carp); Concentration: 62.2 mg/L for 96 hr /Conditions of bioassay not specified/

EC50; Species: Tetrahymena pyriformis (ciliate protozoan); Concentration: 5.3 mg/L for 24 hr; Effect: inhibition of cell multiplication /Conditions of bioassay not specified in source examined/

EC50; Species: Daphnia pulex (Water flea); Conditions: freshwater; static; Concentration: 4200 ug/L for 48 hr; Effect: intoxication, immobile /formulated product/

EC50; Species: Daphnia magna (Water flea); Concentration: 8.6 mg/L/24 hr; Conditions: not specified; Effect: immobilization.

For more Ecotoxicity Values (Complete) data for DICYCLOPENTADIENE (47 total), please visit the HSDB record page.

1.30e+00

5.40e+00

3.10e-01

6.30e-01

5.00e+00

2.20e-03

8.00e-02

3.00e-04

Volatile

2.56e+02

3.90e+00

1.60e+01

9.40e-01

1.90e+00

The substance is toxic to aquatic organisms.

Dicyclopentadiene's production and use in the synthesis of chlorinated hydrocarbon pesticides and ferrocene, in paint, varnish, and resin manufacture, and in elastomers used as water pond liners may result in its release to the environment through various waste streams. Its use as a repellent for animals such as hares, rabbits, and deer via application of impregnated strip on deciduous and coniferous trees, or by spraying around ornamental plants and shrubs will result in its direct release to the environment. Dicyclopentadiene occurs in crude petroleum and coal tar. If released to air, a vapor pressure of 2.30 mm Hg at 25 °C indicates dicyclopentadiene will exist solely as a vapor in the atmosphere. Vapor-phase dicyclopentadiene will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals, ozone and nitrate radicals; the half-lives for these reactions in air are estimated to be 3.2 hours, 11 minutes and 39 minutes respectively. Dicyclopentadiene absorbs strongly at wavelengths >290 nm and, therefore, may be susceptible to direct photolysis by sunlight. If released to soil, dicyclopentadiene is expected to have low mobility based upon an estimated Koc of 1500. Volatilization from moist soil surfaces is expected to be an important fate process based upon an estimated Henry's Law constant of 0.02 atm-cu m/mole. Dicyclopentadiene is expected to volatilize from dry soil surfaces based upon its vapor pressure. Utilizing the Japanese MITI test, 0% of the Theoretical BOD was reached in 2 weeks indicates that biodegradation is not an important environmental fate process in soil or water. Two field studies in Alberta, Canada found degradation rates of 37-57% in 266 days and not appreciable to 60% in 116 days. If released into water, dicyclopentadiene is expected to adsorb to suspended solids and sediment based upon the estimated Koc. Volatilization from water surfaces is expected to be an important fate process based upon this compound's estimated Henry's Law constant. Estimated volatilization half-lives for a model river and model lake are 3.4 hours and 4.6 days, respectively. A measured BCF range of 58.9-384 indicates that bioconcentration in aquatic organisms is moderate to high. Dicyclopentadiene photoxidizes in natural surface waters exposed to sunlight with a half-life of about 25 days. Occupational exposure to dicyclopentadiene may occur through inhalation and dermal contact with this compound at workplaces where dicyclopentadiene is produced or used. The most likely pathway by which the general public is exposed to dicyclopentadiene is by inhalation due to the presence of this substance in gasoline. (SRC)

Dicyclopentadiene occurs as a component of crude petroleum(1) and in coal tar(2).

Dicyclopentadiene's production and use in the synthesis of chlorinated hydrocarbon pesticides and ferrocene, in paint, varnish, and resin manufacture, and in elastomers used as water pond liners(1) may result in its release to the environment through various waste streams(SRC). Its use as a repellent for animals such as hares, rabbits, and deer via application of impregnated strip on deciduous and coniferous trees, or by spraying around ornamental plants and shrubs(1) will result in its direct release to the environment(SRC). Dicyclopentadiene occurs as a by-product of the coke oven industry(1). Dicyclopentadiene is a minor constituent of gasoline formulations(2,3).

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 1500(SRC), determined from a structure estimation method(2), indicates that dicyclopentadiene is expected to have moderate mobility in soil(SRC). Volatilization of dicyclopentadiene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.02 atm-cu m/mole(SRC), derived from its vapor pressure, 2.30 mm Hg(3), and water solubility, 20 mg/L(4). Dicyclopentadiene is expected to volatilize from dry soil surfaces(SRC) based upon its vapor pressure. Two field studies in Alberta, Canada reported soil biodegradation rates of 37-57% in 266 days and not appreciable to 60% in 116 days(5). A 0% of theoretical BOD as reported using activated sludge in a 2-week Japanese MITI test(6). Although biodegradation of dicyclopentadiene does occur, it is not an important environmental fate process in soil(SRC).

AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 1500(SRC), determined from a structure estimation method(2), indicates that dicyclopentadiene is expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.02 atm-cu m/mole(SRC), derived from its vapor pressure, 2.30 mm Hg(4), and water solubility, 20 mg/L(5). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 3.4 hours and 4.6 days, respectively(SRC). According to a classification scheme(6), a measured BCF range of 58.9-384 in carp (Cyprinus carpio)(7) indicates that bioconcentration in aquatic organisms is moderate to high(SRC). A 0% of theoretical BOD using activated sludge in a 2-week Japanese MITI test(7) indicates that biodegradation is not an important environmental fate process in water(SRC). Photolysis of dicyclopentadiene in natural groudwater by sunlight was found to reduce the concentration by 50% in about 32 day(8). Dicyclopentadiene is an olefin and olefins in surface waters exposed to sunlight react with photo-oxidants (such as hydroxyl radicals, peroxy radicals and singlet oxygen) with a half-life on the order of 25 days(9).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), dicyclopentadiene, which has a vapor pressure of 2.30 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase dicyclopentadiene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be 3.2 hours(SRC), calculated from its rate constant of 1.2X10-10 cu cm/molecule-sec at 25 °C(SRC) that was derived using a structure estimation method(3). Dicyclopentadiene is also degraded in the atmosphere by reaction with ozone and nitrate radicals(4). The half-life for the reaction with ozone is estimated to be 11 minutes(SRC), calculated from its rate constant of 1.46X10-15 cu cm/molecule-sec at 25 °C(4). The half-life for the reaction with nitrate radicals is estimated to be 39 minutes(SRC), calculated from its rate constant of 1.2X10-12 cu cm/molecule-sec at 25 °C(4). Dicyclopentadiene absorbs strongly at wavelengths >290 nm(5) and, therefore, may be susceptible to direct photolysis by sunlight(5).

AEROBIC: Dicyclopentadiene, present at 100 mg/L, reached 0% of its theoretical BOD in 2 weeks using an activated sludge inoculum at 30 mg/L in the Japanese MITI test (OECD 301C) which classified the compound as not readily biodegradable(1). Using OECD Guideline 301F (Ready Biodegradability: Manometric Respirometry Test) with an activated sludge inoculum, a petroleum-cracked stream containing 29% dicyclopentadiene had 0% biodegradation of the dicyclopentadiene fraction after 28 days(2). Very slow biotransformation of dicyclopentadiene was observed when it was inoculated with soil and water obtained from the Rocky Mountain Arsenal(3). Two field studies in Alberta, Canada found biodegradation rates of 37-57% in 266 days and not appreciable to 60% in 116 days(4).

The rate constant for the vapor-phase reaction of dicyclopentadiene with photochemically-produced hydroxyl radicals has been estimated as 1.2X10-10 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1). This corresponds to an atmospheric half-life of about 3.2 hours at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1). The rate constant for the vapor-phase reaction of dicyclopentadiene with atmospheric ozone has been measured as 1.46X10-15 cu cm/molecule-sec at 25 °C(2); this corresponds to an atmospheric half-life of about 11 minutes at an atmospheric concentration of 7X10+11 ozone molecules per cu cm(1). The rate constant for the vapor-phase reaction of dicyclopentadiene with atmospheric nitrate radicals has been measured as 1.2X10-12 cu cm/molecule-sec at 25 °C(2); this corresponds to an atmospheric half-life of about 39 minutes(SRC) at an atmospheric concentration of 2.5X10+8 nitrate radicals per cu cm(3). Dicyclopentadiene is not expected to undergo hydrolysis in the environment due to the lack of functional groups that hydrolyze under environmental conditions(4). Using OECD Method TG 111, dicyclopentadiene was found to be stable in water at 25 °C for 5 days(5). Dicyclopentadiene absorbs strongly at wavelengths >290 nm(5) and, therefore, may be susceptible to direct photolysis by sunlight(5). Photolysis of dicyclopentadiene in natural groudwater by sunlight was found to reduce the concentration by 50% in about 32 day(6). Dicyclopentadiene is an olefin and olefins in surface waters exposed to sunlight react with photo-oxidants (such as hydroxyl radicals, peroxy radicals and singlet oxygen) with a half-life on the order of 25 days(7).

A BCF range of 58.9-384 was measured in fish for dicyclopentadiene using OECD method 305C and carp (Cyprinus carpio) which were exposed over an 8-week period(1). According to a classification scheme(3), this BCF range indicates that bioconcentration in aquatic organisms is moderate to high(SRC). A BCF of 53 was measured in bluegill fish (Lepomis macrochirus) using a concentration of 1 mg/L; however, a "disregarded study" flag was applied for environmental fate assessment as the exposure period was only 96 hours(4).

Using a structure estimation method based on molecular connectivity indices(1), the Koc of dicyclopentadiene can be estimated to be 1500(SRC). According to a classification scheme(2), this estimated Koc value suggests that dicyclopentadiene is expected to have low mobility in soil.

The Henry's Law constant for dicyclopentadiene is estimated as 0.02 atm-cu m/mole(SRC) derived from its vapor pressure, 2.30 mm Hg(1), and water solubility, 20 mg/L(2). This Henry's Law constant indicates that dicyclopentadiene is expected to volatilize rapidly from water surfaces(3). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(3) is estimated as 3.4 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(3) is estimated as 4.6 days(SRC). Dicyclopentadiene's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Dicyclopentadiene is expected to volatilize from dry soil surfaces(SRC) based upon its vapor pressure(1).

GROUNDWATER: Dicyclopentadiene was qualitatively determined in groundwater samples obtained near an Italian alkyd resin plant(1) and from the Rocky Mountain Arsenal area of Commerce City, CO(2). Dicyclopentadiene was detected in 17 of 96 groundwater samples collected near Dusseldorf, Germany between 2001-2003 (limit of detection: 0.003 ug/L) at a concentration range of 0.05-1.04 ug/L and average and median levels of 0.26 and 0.10 ug/L respectively(3).

DRINKING WATER: Dicyclopentadiene has been listed as being identified in drinking water(1,2).

SURFACE WATER: Dicyclopentadiene was qualitatively determined in a liquid waste pond, Commerce City, CO, 1981, which had been abandoned by a pesticide manufacturer four years previously(1). Dicyclopentadiene was reported in average concentrations of 0.1 ug/L, <0.1 ug/L, 0.1 ug/L and 0.6 ug/L for the Rhine, Meuse, Northern Delta Area and Westerscheld surface waters in the Netherlands from 1992-1997(2). Dicyclopentadiene was found in the Llobregat aquifer system in Barcelona, Spain from December 1992 to May 1996 at concentrations of <0.01 ug/L to 8.39 ug/L(3).

Dicyclopentadiene has been found in two of sixty-three industrial effluent samples obtained from a wide range of chemical manufacturers from 1976-1978 in areas across the USA at a concentration of <10 ug/L(1). Dicyclopentadiene was found in one of three publically owned treatment facilities in NJ at a concentration of 9 ppb(2).

SOIL: Dicyclopentadiene was qualitatively determined in soil samples obtained on the Rocky Mt arsenal, CO, from 1975 to 1977 arising from the on site production of pesticides(1).

Analysis of 8 commercial gasolines detected dicyclopentadiene levels of <10 to 90 ppm(1).

According to the 2012 TSCA Inventory Update Reporting data, 11 reporting facilities estimate the number of persons reasonably likely to be exposed during the manufacturing, processing, or use of dicyclopentadiene in the United States may be as low as <10 workers and as high as 25-49 workers per plant; the data may be greatly underestimated due to confidential business information (CBI) or unknown values(1).

NIOSH (NOES Survey 1981-1983) has statistically estimated that 6,248 workers (442 of these are female) are potentially exposed to dicyclopentadiene in the US(1). Occupational exposure to dicyclopentadiene may occur through inhalation and dermal contact with this compound at workplaces where dicyclopentadiene is produced or used(SRC). The most likely pathway by which the general public is exposed to dicyclopentadiene is by inhalation due to the presence of this substance in gasoline(SRC).

SRP: Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in air, soil or water; effects on animal, aquatic and plant life; and conformance with environmental and public health regulations. If it is possible or reasonable use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination.

Product: Burn in a chemical incinerator equipped with an afterburner and scrubber but exert extra care in igniting as this material is highly flammable. Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this material; Contaminated packaging: Dispose of as unused product.

SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

For more Disposal Methods (Complete) data for DICYCLOPENTADIENE (6 total), please visit the HSDB record page.

/GUIDE 130 FLAMMABLE LIQUIDS (Non-Polar/Water-Immiscible/Noxious)/ Fire or Explosion: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

/GUIDE 130 FLAMMABLE LIQUIDS (Non-Polar/Water-Immiscible/Noxious)/ Health: May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

/GUIDE 130 FLAMMABLE LIQUIDS (Non-Polar/Water-Immiscible/Noxious)/ Public Safety: CALL Emergency Response Telephone Number on Shipping Paper first. If Shipping Paper not available or no answer, refer to appropriate telephone number listed on the inside back cover. As an immediate precautionary measure, isolate spill or leak area for at least 50 meters (150 feet) in all directions. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate closed spaces before entering.

/GUIDE 130 FLAMMABLE LIQUIDS (Non-Polar/Water-Immiscible/Noxious)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing will only provide limited protection.

For more DOT Emergency Guidelines (Complete) data for DICYCLOPENTADIENE (8 total), please visit the HSDB record page.

2048 130P

UN 2048; Dicyclopentadiene

IMO 3; Dicyclopentadiene

49 072 19; Dicyclopentadiene (flammable liquid, not otherwise specified)

No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless that person is registered in conformance ... and the hazardous material is properly classed, described, packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardous materials regulations (49 CFR 171-177)./

The International Air Transport Association (IATA) Dangerous Goods Regulations are published by the IATA Dangerous Goods Board pursuant to IATA Resolutions 618 and 619 and constitute a manual of industry carrier regulations to be followed by all IATA Member airlines when transporting hazardous materials. Dicyclopentadiene is included on the dangerous goods list.

The International Maritime Dangerous Goods Code lays down basic principles for transporting hazardous chemicals. Detailed recommendations for individual substances and a number of recommendations for good practice are included in the classes dealing with such substances. A general index of technical names has also been compiled. This index should always be consulted when attempting to locate the appropriate procedures to be used when shipping any substance or article. Dicyclopentadiene is included on the dangerous goods list.

Flammable Liquid

Symbol: F, Xn, N; R: 11-20/22-36/37/38-51/53; S: (2)-36/37-61

UN Hazard Class: 3; UN Pack Group: III