methylcyclopentane

This chemical does not meet GHS hazard criteria for 0.2% (1 of 549) of reports.

H225 (98.5%): Highly Flammable liquid and vapor [Danger Flammable liquids]

H304 (56.6%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]

H315 (37.2%): Causes skin irritation [Warning Skin corrosion/irritation]

H336 (45.2%): May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]

H412 (11.5%): Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

P210, P233, P240, P241, P242, P243, P261, P264, P271, P273, P280, P301+P316, P302+P352, P303+P361+P353, P304+P340, P319, P321, P331, P332+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 549 reports by companies from 26 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Reported as not meeting GHS hazard criteria per 1 of 549 reports by companies.

There are 25 notifications provided by 548 of 549 reports by companies with hazard statement code(s).

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.

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. Volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. 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. IMMEDIATELY transport the victim to a hospital. 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.

In Canada, an Emergency Response Assistance Plan (ERAP) may be required for this product. Please consult the shipping paper and/or the "ERAP" section.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:

CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient. CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective.

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. For petroleum crude oil, do not spray water directly into a breached tank car. This can lead to a dangerous boil over. 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)

WATER MAY BE INEFFECTIVE.

If material on fire or involved in fire: Do not extinguish fire unless flow can be stopped or safely confined. Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Keep run-off water out of sewers and water sources.

Flashback along vapor trail may occur.

· 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 128 [Flammable Liquids (Water-Immiscible)]:

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.

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.

If material not on fire and not involved in fire: Keep sparks, flames, and other source 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.

Personnel protection: Keep upwind. Avoid breathing vapors.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:

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)

IN GENERAL, MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS...SHOULD BE STORED IN COOL, WELL VENTILATED PLACE, OUT OF DIRECT RAYS OF SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, AND SHOULD BE PERIODICALLY INSPECTED & MONITORED. INCOMPATIBLE MATERIALS SHOULD BE ISOLATED...

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

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

500.0 [ppm]

49 [mg/m3]

540 [mg/m3]

3200 [mg/m3]

1000.0 [ppm]

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

CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective.

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.

· For petroleum crude oil, do not spray water directly into a breached tank car. This can lead to a dangerous boil over.

· 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.

Self-contained breathing apparatus; goggles or face shield; rubber gloves. (USCG, 1999)

Self-contained breathing apparatus; goggles or face shield; rubber gloves.

Methylcyclopentane appears as a colorless liquid. Insoluble in water and less dense than water. Flash point near 20 °F. Very dangerous fire risk. Vapors may be narcotic and irritating. Used to make other chemicals.

Colorless liquid with a sweet gasoline-like odor; [CHEMINFO]

COLORLESS LIQUID

Like gasoline

161.2 °F at 760 mmHg (NTP, 1992)

71.8 °C @ 760 MM HG

71.8 °C @760 [mm Hg]

-224.3 °F (NTP, 1992)

-142.5 °C

-139.8 °C

-11 °F (NTP, 1992)

Less than 20 °F (less than -7 °C) (Closed Cup)

less than 1 mg/mL at 72 °F (NTP, 1992)

Insoluble in water, miscible in ethanol, ether, and acetone.

water solubility = 42 mg/l @ 25 °C

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

0.7486 @ 20 °C/4 °C

0.750 @ 20°C

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

2.9 (AIR= 1)

100 mmHg at 64.2 °F ; 200 mmHg at 93.2 °F (NTP, 1992)

138.0 [mmHg]

vapor pressure = 138 mm Hg at 25 °C

100 [mm Hg] @17.899999999999999 °C

log Kow = 3.37

Henry's Law constant = 0.361 atm-cu m/mole

624 °F (USCG, 1999)

496 °F (258 °C)

3938.1 kJ/mol @ 298.15 K

29.08 kJ/mol

21.60 dynes/cm= 0.0216 N/m @ 20 °C

INDEX OF REFRACTION: 1.4097 @ 20 °C/D

Heat of Fusion: 6.93 kJ/mol

Liquid molar volume = 0.113042 cu m/kmol

Ideal Gas Heat of formation = -1.0669X10+8 J/kmol

Boiling point

Chemical diffusion

Composition

Critical point

Diamagnetic susceptibility

Highly flammable. Insoluble in water.

Hydrocarbons, Aliphatic Saturated

Highly Flammable

METHYLCYCLOPENTANE can react vigorously with oxidizers. (NTP, 1992).

Methyl cyclopentane

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

Petroleum distillates are central nervous system depressants and cause pulmonary damage. (A600)

Methylcyclopentane is found in gasoline, which is possibly carcinogenic to humans (Group 2B). (L135)

Petroleum distillates are aspiration hazards and may cause pulmonary damage, central nervous system depression, and cardiac effects such as cardiac arrhythmias. They may also affect the blood, immune system, liver, and kidney. (A600, L1297)

Oral (L400) ; inhalation (L400) ; dermal (L400)

Petroleum distillate poisoning may cause nausea, vomiting, cough, pulmonary irritation progressing to pulmonary edema, bloody sputum, and bronchial pneumonia. At high amounts, central nervous system depression may also occur, with symptoms such as weakness, dizziness, slow and shallow respiration, unconsciousness, and convulsions. Petroleum distillates are also irritating to the skin. (A594)

Neurotoxin - Acute solvent syndrome

Methylcyclopentane

4 x 10^-1 mg/kg-day

PDF Document

Inadequate information to assess carcinogenic potential

PPRTV Current

LCLo (mice) = 95,000 mg/m3

Treatment is mainly symptomatic and supportive. Gastric lavage, emesis, and the administration of activated charcoal should be avoided, as vomiting increases the risk of aspiration. (A600)

Toxicologically, it exhibits no safety margin between onset of /SRP: impared conscienceness, CNS Depression/ and death.

POLYNEUROPATHY OF THE MOTOR TYPE WAS REPORTED BY WORKERS IN A HANDICRAFT FIRM. THE SOLVENT WAS ANALYZED AND SHOWED THE PRESENCE OF METHYLCYCLOPENTANE. THE NEUROTOXICITY OF METHYLCYCLOPENTANE & NEUROTOXIC INTERACTION WITH OTHER COMPOUNDS HAS YET TO BE DETERMINED.

Commercial hexane which caused polyneuropathy in many workers contained 10-40% of 2-methylpentane, 3-methylpentane and methylcyclopentane in addition to n-hexane. The hexacarbon compounds methyl n-butyl ketone, 2,5-hexanedione and etc were shown to be neurotoxic like n-hexane. Therefore, 2-methylpentane, 3-methylpentane and methylcyclopentane which are also hexacarbon compounds were suspected to be neurotoxic, but their neurotoxicity had not been sufficiently investigated. The present experiment was performed to clarify their neurotoxicity by measuring the nerve conduction velocity in the rat's tail. Thirty rats were divided into five groups of 5-7 rats. n-Hexane, 2-methylpentane, 3-methylpentane and methylcyclopentane were diluted with olive oil and orally administered daily for eight weeks. The body weight, motor nerve conduction velocity, motor distal latency and mixed nerve conduction velocity were measured before administration, after two, four, six and eight weeks administration. The n-hexane group showed a distinct impairment of the functional states of the peripheral nerve. Methylcyclopentane, 2-methylpentane, and 3-methylpentane group had some significant differences in comparison with the control in the experiment, although these differences were not so distinct as those in n-hexane group. The results revealed that the neurotoxicity of the three chemicals was not so severe as that of n-hexane and were in the order of n-hexane greater than methylcyclopentane greater than or equal to 2-methylpentane divided by 3-methylpentane.

Commercial hexane is a solvent consisting of six-carbon isomers principally n-hexane (53%), 3-methyl pentane (16%), methylcyclopentane (14%), and 2-methyl pentane (12%). Male and female CD (Sprague-Dawley) rats were exposed to commercial hexane vapor at target concentrations of 0, 900, 3000, or 9000 ppm for 6 hr/day, 5 days/week, over two generations. At both the F0 breed to produce Fl litters and the Fl breed to produce F2 litters, reproductive parameters were unaffected by commercial hexane exposure. Litter size and postnatal survival were not significantly different between exposure groups. However, reductions in body weight and body weight gain were observed in both Fl and F2 litters exposed to 9000 ppm. Effects on body weight were not observed in offspring exposed to the two lower concentrations of commercial hexane. Histopathologic examination of selected organs revealed hyaline droplet nephropathy in adult F0 and Fl males exposed to 9000 ppm commercial hexane. No other treatment related lesions were observed. In summary exposure of rats to commercial hexane for two generations resulted in reduced body weight gains at 9000 ppm but no adverse effects on reproduction. The NOEL for this study was 3000 ppm.

Methylcyclopentane's production and use in organic synthesis, as an extractive solvent, and an azeotropic distillation agent may result in its release to the environment through various waste streams. Methylcyclopentane has been identified in numerous environmental samples including emissions from automobiles, drinking water, surface water, industrial effluents, atmospheric samples, and sediments. It has also been detected as an indoor pollutant from various household products, as volatile component of baked potatoes and beef, in mother's milk and in human expired air. If released to soil, methylcyclopentane should have low mobility. Volatilization of methylcyclopentane will be important from moist and dry soil surfaces. Insufficient data are available to determine the rate or importance of biodegradation of methylcyclopentane in soil or water. If released to water, methylcyclopentane should adsorb to suspended solids and sediment. Methylcyclopentane will volatilize from water surfaces with estimated half-lives for a model river and model lake of 2.7 hours and 3.6 days, respectively. An estimated BCF value of 210 suggests that methylcyclopentane will bioconcentrate in aquatic organisms. If released to the atmosphere, methylcyclopentane will exist primarily in the vapor phase. Vapor-phase methylcyclopentane is degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals with an estimated half-life of about 2.3 days. Particulate-phase methylcyclopentane may be physically removed from the air by wet deposition. (SRC)

Methylcyclopentane's production and use in organic synthesis, as an extractive solvent, and an azeotropic distillation agent(1) may result in its release to the environment through various waste streams(SRC).

TERRESTRIAL FATE: Based on a recommended classification scheme(1), an estimated Koc value of 1600(SRC), determined from an experimental log Kow(2) and a recommended regression-derived equation(3), indicates that methylcyclopentane should have low mobility in soil(SRC). Volatilization of methylcyclopentane may be important from moist soil surfaces(SRC) given an experimental Henry's Law constant of 0.369 atm-cu m/mole(4), and from dry soil surfaces(SRC) based on an experimental vapor pressure of 138 mm Hg(5). Insufficient data are available to determine the rate or importance of biodegradation of methylcyclopentane in soil(SRC).

AQUATIC FATE: An estimated Koc value of 1600(SRC), determined from an experimental log Kow(1) and a recommended regression-derived equation(2), indicates that methylcyclopentane should adsorb to suspended solids and sediment(SRC) in the water(2,SRC). Methylcyclopentane would volatilize from water surfaces(2,SRC) based on an experimental Henry's Law constant of 0.369 atm-cu m/mole(3). Estimated half-lives for a model river and model lake are 2.7 hours and 3.6 days, respectively(2,SRC). An estimated BCF value of 210(2,SRC), from an experimental log Kow(1), suggests that methylcyclopentane will bioconcentrate in aquatic organisms(SRC) according to a recommended classification scheme(4). Insufficient data are available to determine the rate or importance of biodegradation of methylcyclopentane in water(SRC).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), methylcyclopentane, which has an experimental vapor pressure of 138 mm Hg at 25 °C(2) will exist primarily in the vapor phase in the ambient atmosphere. Vapor-phase methylcyclopentane 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 about 2.3 days(3,SRC). Particulate-phase methylcyclopentane may be physically removed from the air by wet deposition(SRC).

Nocardia corallina strain V49 (isolated from soil) did not produce identifiable oxidation products when exposed to methylcyclopentane vapors when cultured on agar-resin plates, under co-oxidative conditions(1). Microorganisms were isolated from groundwater contaminated with high octane gasoline (Ambler PA)(2). Of these microorganisms, 32 pure cultures were isolated that used gasoline as a sole source of carbon; however, none used methylcyclopentane when cultured in basal mineral salts medium(2). When Sunoco 260 was added to Ambler water, methylcyclopentane showed only a 10% drop in concentration after 192 hours(2). When methylcyclopentane was incubated with Nocardia sp 802-6, 802-29, and 802-9 along with hexadecane as a co-oxidation growth substrate on agar-resin plates, no oxidation products of sufficient quantity for identification were found(2). When the fermentation was carried out in an aqueous system, similar results were obtained(2). Microorganisms used in the aqueous system were Nocardia sp 802-6 and 803-9 with hexadecane and Pseudomonas sp 803-2 with hexane(2).

The rate constant for the vapor-phase reaction of methylcyclopentane with photochemically produced hydroxyl radicals has been estimated as 7.04X10-12 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1,SRC). This corresponds to an atmospheric half-life of about 2.3 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1,SRC).

An estimated BCF value of 210 was calculated for methylcyclopentane(SRC), using an experimental log Kow of 3.37(1) and a recommended regression-derived equation(2). According to a recommended classification scheme(3), this BCF value suggests that bioconcentration in aquatic organisms will be an important fate process(SRC).

The Koc of methylcyclopentane is estimated as approximately 1600(SRC), using an experimental log Kow of 3.37(1) and a regression-derived equation(2,SRC). According to a recommended classification scheme(3), this estimated Koc value suggests that methylcyclopentane should have low mobility in soil(SRC).

The Henry's Law constant for methylcyclopentane has been experimentally determined to be 0.369 atm-cu m/mole(1). This value indicates that methylcyclopentane will volatilize rapidly from water surfaces(2,SRC). 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) is estimated as approximately 2.7 hours(2,SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is estimated as approximately 3.6 days(2,SRC). Methylcyclopentane's high vapor pressure, 138 mm Hg(3) and high Henry's Law constant(1) indicate that volatilization from dry and moist soil may occur(SRC).

DRINKING WATER: Methylcyclopentane has been detected qualitatively in 2 out 14 samples of English water treatment works taps(1). Methylcyclopentane has been identified in drinking water(2). Methylcyclopentane along with cyclopentene were found in polluted drinking water at a combined concentration of 3.2X10-4 mg/l(3).

SURFACE WATER: A sample of water taken from the Inner Harbor Navigation Canal of Lake Pontchartrain (New Orleans, LA) contained methylcyclopentane at an average concentration of 0.5 ppb(1).

OTHER EFFLUENTS: Methylcyclopentane was detected during the incineration of plastics(1). Methylcyclopentane was detected in 10 out of 63 industrial effluents (9 samples were less than 10 ug/l and 1 sample was in the range of 10-100 ug/l)(2).

Methylcyclopentane represents 0.8% (by weight) of the hydrocarbons (non-methane organic gases) in engine exhaust, 1.1% for headspace gasoline vapors, and 2.5% for whole gasoline(1). Levels of methylcyclopentane from jet engine exhaust from flight condition simulation experiments using two engine types (YJ93-GE-3 and J85-GE-SB) ranged from 0.06-6.9 ppm C depending on where in the exhaust stream the measurement was taken(2). Average methylcyclopentane concns taken from 8 trips in a car (6 trips in a new car and 2 trips in older cars) and in a commuter train were 5.0 and 0.8 ug/cu m, respectively(3). Exhaust samples from 67 different automobiles with no emission control devices were found to contain an average of 1% wt/wt methylcyclopentane(4). The concn of methylcyclopentane in gasoline vapors from refueling cars at service stations ranged between 0.006 and 0.88 ppm(5). The average percentages of methylcyclopentane in three gasoline vapors are: Amoco Oil (bulk terminal exposure), 1.1 wt%; Amoco Oil (marine loading exposure), 1.5 wt%; and Shell Oil, 1.3 vol%(6). A study conducted in Atlanta (1990) found the average concn of methylcyclopentane in roadway, whole gas (average of six octanes), whole gas (87 octane), whole gas (89 octane), whole gas (92/93 octane), headspace gas (at 24 °C and average of six octanes), headspace gas (at 32 °C and average of six octanes), airport, and aircraft emissions were: 0.783, 1.10, 1.31, 1.04, 0.6, 0.81, 0.86, 0.6, and 0.344 ppbC%, respectively(7).

Methylcyclopentane was detected in the Craebeckx Tunnel (Antwerp, Belgium) in 1991 at concns that were similar for congested (0.049 g/kg carbon and total yearly emissions: 188 tons/year) and non-congested traffic (0.039 g/kg carbon and total yearly emissions: 150 tons/year)(1). A study conducted in Chicago found the average concn of methylcyclopentane in regular fuel (87 octane), mid-grade (89 octane), premium (93 octane), hot soak, cold start, roadway, and petroleum refinery emissions to be 0.98, 0.84, 0.34, 1.17, 1.65, 1.22, and 0.83 wt%, respectively(2). In Southern California, the methylcyclopentane profile for various emissions for vehicle exhaust was 0.92, 1.77, 0.77, 0.00, 0.83, and 0.86 wt% for a 46 car study, 13 samples from the Caldecott Tunnel, cold start, stabilized, hot start, and from an older fleet, respectively(3). Gasoline emission profiles for methylcyclopentane are as follows: 0.69, 1.14, 0.20, 2.44, 2.19, 1.08, and 1.49 wt% for diurnal evaporative emissions (older fleet), hot soak evaporative emissions (older fleet), running loss (older fleet), summer liquid gas, winter liquid gas, summer gas headspace, and winter gas headspace, respectively(3). In oil field emissions (Tulsa, OK), methylcyclopentane was detected at average concn of 164.6 ppbC and approximately 85 ppbC for two different samples(4). A study conducted along US Highway 70 near Raleigh, NC detected methylcyclopentane in automobile emissions at average percents of 1.17, 1.09, 1.13, 1.22, 1.03, and 1.00 %ppbC at five different sites(5). Samples of air taken from the Tingstad Tunnel in Goteborg, Sweden, on five different days, contained methylcyclopentane at 1.6, 1.6, 1.8, 2.0, and 1.9% of non-methane volatile hydrocarbons(6). Methylcyclopentane composition in the vapor of different types of petrol is 2.2 (conventional "cracked" Statoil 95), 2.6 (conventional "reformate" Shell 95), 0.2 (reformulated "alkylate" Aspen 2T), and 0.04% (reformulated "alkylate" OK Special)(7).

Methylcyclopentane was detected in surface sediments from Walvis Bay in 97 m deep water at 0.1 and 0.5 ng/g dry weight of sediment at 32-36 cm and 40 cm deep, respectively(1).

URBAN/SUBURBAN: It was determined that of the methylcyclopentane in the Los Angeles atmosphere, approximately 56% is from automobile exhaust, 30% from whole gasoline, and 14% from gasoline vapor(1). The average concn of methylcyclopentane in 16 air samples from Los Angeles, CA taken in late summer to fall 1960 was 19 ppbv (range <0.5-50.0 ppbv)(2). Methylcyclopentane was qualitatively detected in 5 air samples taken in Leningrad, USSR during the summer and fall of 1976(3,4). The average concn of methylcyclopentane in 140 air samples from Syndey, Australia (1979-1980) was 1.2 ppbv(5). Methylcyclopentane concns in Los Angeles air samples taken in 1981 ranged from 4-16 ppbv(6). Air samples from four different sites in Tulsa OK (Health Department building, Post Office, Liberty Mounds, and Texaco Refinery) were all below 0.01 ppbv(7). Samples of air taken in Janesville, WI in 1977 contained methylcyclopentane at concns of 1.0-2.0 ppbv (in an urban plume - Chicago, IL) and 1.5 ppbv in an industrial plume (from an auto plant)(8).

URBAN/SUBURBAN: Methylcyclopentane was qualitatively identified in New Jersey air from Rutherford, Newark, Elizabeth, and the Pine Barrens (Batsto)(1). Methylcyclopentane was identified in air samples from Bangkok City, Thailand at concns of 23 ug/cu m for a institutional-commercial area, 14 ug/cu m for a commercial-residential area, 9 ug/cu m from the city outskirts at a dump site, and 1 ug/cu m and 2 ug/cu m for the community nearby the dump site(2). Average methylcyclopentane concns in air samples from Vienna were 4.2 (from the roof of the highest building), 9.6 (at a heavily used street), 2.4 (in the suburbs), and 1.2 ppbC (background)(3). Methylcyclopentane was qualitatively identified in the city air of Pretoria, Johannesburg, and Durban, South Africa(4). Methylcyclopentane was detected in the ambient air from the Kawanah Valley, WV, Houston, TX and vicinity, and the Los Angeles Basin(5). Methylcyclopentane was identified in the air of Huntington Park, Los Angeles at 3.7 ppb (ground level, afternoon), 28.1 (groundlevel, morning), 1.6 (at 1500 ft, morning), and 0.1 ppb (at 2200 ft, morning)(6). Methylcyclopentane was identified in the air of suburban, urban, and source dominated sites at the following average concns: 1.043 (219 samples), 1.053 (526 samples), and 3.100 ppbv (14 samples), respectively(7). The average concn of methylcyclopentane from a survey of 39 U.S. cities from 1984-1985 is 6.4 ppbC(8).

URBAN/SUBURBAN: Three measurement campaigns identified methylcyclopentane in air from the Grenoble area at average concns of 0.52, 0.378, and 0.766 ppm(1). Methylcyclopentane was detected in a year long survey of volatile organic compounds in Washington, DC in 39.29% of the samples at an average concn of 0.11 ppbv(2). The average methylcyclopentane concn in West German homes is 2.8 ug/cu m (range of 1.0-15 ug/cu m)(3).

RURAL/REMOTE: Methylcyclopentane was detected in 15 air samples taken in Jones State Forest, TX taken over 3 days in 1978 at an average concn of 4.61 ppbv (range 1.9-9.8 ppbv)(1). Methylcyclopentane was identified in the air of six remote sites in North Carolina at the following median concns (ppbC): Roan Mountain, 0.1; Grandfather Mountain, 0.1; Linville Gorge, 0.2; Rich Mountain, 0.2; Boone Center, 4.7; and Boone Outskirts, 0.7(2). Methylcyclopentane was a major compound identified in the air from a 45 year old spruce forest collected in 1988 in West Germany(3).

SOURCE DOMINATED: Methylcyclopentane was identified in atmospheric grab sample taken near an oil fire at a concn of 0.21 mg/cu m(1).

Methylcyclopentane has been identified as a volatile component of baked potatoes(1) and beef(2).

Methylcyclopentane was qualitatively found in samples of mother's milk collected from Bayonne, NJ (1 sample), Jersey City, NJ (1 sample), Pittsburgh, PA (2 samples), and Baton Rouge, LA (2 samples)(1).

Methylcyclopentane's production and use in organic synthesis, as an extractive solvent, and an azeotropic distillation agent may result in its release to the environment through various waste streams. Methylcyclopentane has been identified in numerous environmental samples including emissions from automobiles, drinking water, surface water, industrial effluents, atmospheric samples, and sediments. It has also been detected as an indoor pollutant from various household products, as volatile component of baked potatoes and beef, in mother's milk and in human expired air. If released to soil, methylcyclopentane should have low mobility. Volatilization of methylcyclopentane will be important from moist and dry soil surfaces. Insufficient data are available to determine the rate or importance of biodegradation of methylcyclopentane in soil or water. If released to water, methylcyclopentane should adsorb to suspended solids and sediment. Methylcyclopentane will volatilize from water surfaces with estimated half-lives for a model river and model lake of 2.7 hours and 3.6 days, respectively. An estimated BCF value of 210 suggests that methylcyclopentane will bioconcentrate in aquatic organisms. If released to the atmosphere, methylcyclopentane will exist primarily in the vapor phase. Vapor-phase methylcyclopentane is degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals with an estimated half-life of about 2.3 days. Particulate-phase methylcyclopentane may be physically removed from the air by wet deposition. (SRC)

Methylcyclopentane's production and use in organic synthesis, as an extractive solvent, and an azeotropic distillation agent(1) may result in its release to the environment through various waste streams(SRC).

TERRESTRIAL FATE: Based on a recommended classification scheme(1), an estimated Koc value of 1600(SRC), determined from an experimental log Kow(2) and a recommended regression-derived equation(3), indicates that methylcyclopentane should have low mobility in soil(SRC). Volatilization of methylcyclopentane may be important from moist soil surfaces(SRC) given an experimental Henry's Law constant of 0.369 atm-cu m/mole(4), and from dry soil surfaces(SRC) based on an experimental vapor pressure of 138 mm Hg(5). Insufficient data are available to determine the rate or importance of biodegradation of methylcyclopentane in soil(SRC).

AQUATIC FATE: An estimated Koc value of 1600(SRC), determined from an experimental log Kow(1) and a recommended regression-derived equation(2), indicates that methylcyclopentane should adsorb to suspended solids and sediment(SRC) in the water(2,SRC). Methylcyclopentane would volatilize from water surfaces(2,SRC) based on an experimental Henry's Law constant of 0.369 atm-cu m/mole(3). Estimated half-lives for a model river and model lake are 2.7 hours and 3.6 days, respectively(2,SRC). An estimated BCF value of 210(2,SRC), from an experimental log Kow(1), suggests that methylcyclopentane will bioconcentrate in aquatic organisms(SRC) according to a recommended classification scheme(4). Insufficient data are available to determine the rate or importance of biodegradation of methylcyclopentane in water(SRC).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), methylcyclopentane, which has an experimental vapor pressure of 138 mm Hg at 25 °C(2) will exist primarily in the vapor phase in the ambient atmosphere. Vapor-phase methylcyclopentane 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 about 2.3 days(3,SRC). Particulate-phase methylcyclopentane may be physically removed from the air by wet deposition(SRC).

Nocardia corallina strain V49 (isolated from soil) did not produce identifiable oxidation products when exposed to methylcyclopentane vapors when cultured on agar-resin plates, under co-oxidative conditions(1). Microorganisms were isolated from groundwater contaminated with high octane gasoline (Ambler PA)(2). Of these microorganisms, 32 pure cultures were isolated that used gasoline as a sole source of carbon; however, none used methylcyclopentane when cultured in basal mineral salts medium(2). When Sunoco 260 was added to Ambler water, methylcyclopentane showed only a 10% drop in concentration after 192 hours(2). When methylcyclopentane was incubated with Nocardia sp 802-6, 802-29, and 802-9 along with hexadecane as a co-oxidation growth substrate on agar-resin plates, no oxidation products of sufficient quantity for identification were found(2). When the fermentation was carried out in an aqueous system, similar results were obtained(2). Microorganisms used in the aqueous system were Nocardia sp 802-6 and 803-9 with hexadecane and Pseudomonas sp 803-2 with hexane(2).

The rate constant for the vapor-phase reaction of methylcyclopentane with photochemically produced hydroxyl radicals has been estimated as 7.04X10-12 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1,SRC). This corresponds to an atmospheric half-life of about 2.3 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1,SRC).

An estimated BCF value of 210 was calculated for methylcyclopentane(SRC), using an experimental log Kow of 3.37(1) and a recommended regression-derived equation(2). According to a recommended classification scheme(3), this BCF value suggests that bioconcentration in aquatic organisms will be an important fate process(SRC).

The Koc of methylcyclopentane is estimated as approximately 1600(SRC), using an experimental log Kow of 3.37(1) and a regression-derived equation(2,SRC). According to a recommended classification scheme(3), this estimated Koc value suggests that methylcyclopentane should have low mobility in soil(SRC).

The Henry's Law constant for methylcyclopentane has been experimentally determined to be 0.369 atm-cu m/mole(1). This value indicates that methylcyclopentane will volatilize rapidly from water surfaces(2,SRC). 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) is estimated as approximately 2.7 hours(2,SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is estimated as approximately 3.6 days(2,SRC). Methylcyclopentane's high vapor pressure, 138 mm Hg(3) and high Henry's Law constant(1) indicate that volatilization from dry and moist soil may occur(SRC).

DRINKING WATER: Methylcyclopentane has been detected qualitatively in 2 out 14 samples of English water treatment works taps(1). Methylcyclopentane has been identified in drinking water(2). Methylcyclopentane along with cyclopentene were found in polluted drinking water at a combined concentration of 3.2X10-4 mg/l(3).

SURFACE WATER: A sample of water taken from the Inner Harbor Navigation Canal of Lake Pontchartrain (New Orleans, LA) contained methylcyclopentane at an average concentration of 0.5 ppb(1).

OTHER EFFLUENTS: Methylcyclopentane was detected during the incineration of plastics(1). Methylcyclopentane was detected in 10 out of 63 industrial effluents (9 samples were less than 10 ug/l and 1 sample was in the range of 10-100 ug/l)(2).

Methylcyclopentane represents 0.8% (by weight) of the hydrocarbons (non-methane organic gases) in engine exhaust, 1.1% for headspace gasoline vapors, and 2.5% for whole gasoline(1). Levels of methylcyclopentane from jet engine exhaust from flight condition simulation experiments using two engine types (YJ93-GE-3 and J85-GE-SB) ranged from 0.06-6.9 ppm C depending on where in the exhaust stream the measurement was taken(2). Average methylcyclopentane concns taken from 8 trips in a car (6 trips in a new car and 2 trips in older cars) and in a commuter train were 5.0 and 0.8 ug/cu m, respectively(3). Exhaust samples from 67 different automobiles with no emission control devices were found to contain an average of 1% wt/wt methylcyclopentane(4). The concn of methylcyclopentane in gasoline vapors from refueling cars at service stations ranged between 0.006 and 0.88 ppm(5). The average percentages of methylcyclopentane in three gasoline vapors are: Amoco Oil (bulk terminal exposure), 1.1 wt%; Amoco Oil (marine loading exposure), 1.5 wt%; and Shell Oil, 1.3 vol%(6). A study conducted in Atlanta (1990) found the average concn of methylcyclopentane in roadway, whole gas (average of six octanes), whole gas (87 octane), whole gas (89 octane), whole gas (92/93 octane), headspace gas (at 24 °C and average of six octanes), headspace gas (at 32 °C and average of six octanes), airport, and aircraft emissions were: 0.783, 1.10, 1.31, 1.04, 0.6, 0.81, 0.86, 0.6, and 0.344 ppbC%, respectively(7).

Methylcyclopentane was detected in the Craebeckx Tunnel (Antwerp, Belgium) in 1991 at concns that were similar for congested (0.049 g/kg carbon and total yearly emissions: 188 tons/year) and non-congested traffic (0.039 g/kg carbon and total yearly emissions: 150 tons/year)(1). A study conducted in Chicago found the average concn of methylcyclopentane in regular fuel (87 octane), mid-grade (89 octane), premium (93 octane), hot soak, cold start, roadway, and petroleum refinery emissions to be 0.98, 0.84, 0.34, 1.17, 1.65, 1.22, and 0.83 wt%, respectively(2). In Southern California, the methylcyclopentane profile for various emissions for vehicle exhaust was 0.92, 1.77, 0.77, 0.00, 0.83, and 0.86 wt% for a 46 car study, 13 samples from the Caldecott Tunnel, cold start, stabilized, hot start, and from an older fleet, respectively(3). Gasoline emission profiles for methylcyclopentane are as follows: 0.69, 1.14, 0.20, 2.44, 2.19, 1.08, and 1.49 wt% for diurnal evaporative emissions (older fleet), hot soak evaporative emissions (older fleet), running loss (older fleet), summer liquid gas, winter liquid gas, summer gas headspace, and winter gas headspace, respectively(3). In oil field emissions (Tulsa, OK), methylcyclopentane was detected at average concn of 164.6 ppbC and approximately 85 ppbC for two different samples(4). A study conducted along US Highway 70 near Raleigh, NC detected methylcyclopentane in automobile emissions at average percents of 1.17, 1.09, 1.13, 1.22, 1.03, and 1.00 %ppbC at five different sites(5). Samples of air taken from the Tingstad Tunnel in Goteborg, Sweden, on five different days, contained methylcyclopentane at 1.6, 1.6, 1.8, 2.0, and 1.9% of non-methane volatile hydrocarbons(6). Methylcyclopentane composition in the vapor of different types of petrol is 2.2 (conventional "cracked" Statoil 95), 2.6 (conventional "reformate" Shell 95), 0.2 (reformulated "alkylate" Aspen 2T), and 0.04% (reformulated "alkylate" OK Special)(7).

Methylcyclopentane was detected in surface sediments from Walvis Bay in 97 m deep water at 0.1 and 0.5 ng/g dry weight of sediment at 32-36 cm and 40 cm deep, respectively(1).

URBAN/SUBURBAN: It was determined that of the methylcyclopentane in the Los Angeles atmosphere, approximately 56% is from automobile exhaust, 30% from whole gasoline, and 14% from gasoline vapor(1). The average concn of methylcyclopentane in 16 air samples from Los Angeles, CA taken in late summer to fall 1960 was 19 ppbv (range <0.5-50.0 ppbv)(2). Methylcyclopentane was qualitatively detected in 5 air samples taken in Leningrad, USSR during the summer and fall of 1976(3,4). The average concn of methylcyclopentane in 140 air samples from Syndey, Australia (1979-1980) was 1.2 ppbv(5). Methylcyclopentane concns in Los Angeles air samples taken in 1981 ranged from 4-16 ppbv(6). Air samples from four different sites in Tulsa OK (Health Department building, Post Office, Liberty Mounds, and Texaco Refinery) were all below 0.01 ppbv(7). Samples of air taken in Janesville, WI in 1977 contained methylcyclopentane at concns of 1.0-2.0 ppbv (in an urban plume - Chicago, IL) and 1.5 ppbv in an industrial plume (from an auto plant)(8).

URBAN/SUBURBAN: Methylcyclopentane was qualitatively identified in New Jersey air from Rutherford, Newark, Elizabeth, and the Pine Barrens (Batsto)(1). Methylcyclopentane was identified in air samples from Bangkok City, Thailand at concns of 23 ug/cu m for a institutional-commercial area, 14 ug/cu m for a commercial-residential area, 9 ug/cu m from the city outskirts at a dump site, and 1 ug/cu m and 2 ug/cu m for the community nearby the dump site(2). Average methylcyclopentane concns in air samples from Vienna were 4.2 (from the roof of the highest building), 9.6 (at a heavily used street), 2.4 (in the suburbs), and 1.2 ppbC (background)(3). Methylcyclopentane was qualitatively identified in the city air of Pretoria, Johannesburg, and Durban, South Africa(4). Methylcyclopentane was detected in the ambient air from the Kawanah Valley, WV, Houston, TX and vicinity, and the Los Angeles Basin(5). Methylcyclopentane was identified in the air of Huntington Park, Los Angeles at 3.7 ppb (ground level, afternoon), 28.1 (groundlevel, morning), 1.6 (at 1500 ft, morning), and 0.1 ppb (at 2200 ft, morning)(6). Methylcyclopentane was identified in the air of suburban, urban, and source dominated sites at the following average concns: 1.043 (219 samples), 1.053 (526 samples), and 3.100 ppbv (14 samples), respectively(7). The average concn of methylcyclopentane from a survey of 39 U.S. cities from 1984-1985 is 6.4 ppbC(8).

URBAN/SUBURBAN: Three measurement campaigns identified methylcyclopentane in air from the Grenoble area at average concns of 0.52, 0.378, and 0.766 ppm(1). Methylcyclopentane was detected in a year long survey of volatile organic compounds in Washington, DC in 39.29% of the samples at an average concn of 0.11 ppbv(2). The average methylcyclopentane concn in West German homes is 2.8 ug/cu m (range of 1.0-15 ug/cu m)(3).

RURAL/REMOTE: Methylcyclopentane was detected in 15 air samples taken in Jones State Forest, TX taken over 3 days in 1978 at an average concn of 4.61 ppbv (range 1.9-9.8 ppbv)(1). Methylcyclopentane was identified in the air of six remote sites in North Carolina at the following median concns (ppbC): Roan Mountain, 0.1; Grandfather Mountain, 0.1; Linville Gorge, 0.2; Rich Mountain, 0.2; Boone Center, 4.7; and Boone Outskirts, 0.7(2). Methylcyclopentane was a major compound identified in the air from a 45 year old spruce forest collected in 1988 in West Germany(3).

SOURCE DOMINATED: Methylcyclopentane was identified in atmospheric grab sample taken near an oil fire at a concn of 0.21 mg/cu m(1).

Methylcyclopentane has been identified as a volatile component of baked potatoes(1) and beef(2).

Methylcyclopentane was qualitatively found in samples of mother's milk collected from Bayonne, NJ (1 sample), Jersey City, NJ (1 sample), Pittsburgh, PA (2 samples), and Baton Rouge, LA (2 samples)(1).

A study of 43 different types of glues used in shoe factories determined that 32% of the glues contained methylcyclopentane(1). Methylcyclopentane has been identified in a number of household products including: water repellent, spot remover, carburetor and choke cleaner, paint remover, paint thinner, spray paint, lubricant, automotive undercoat, wood stains, varnishes and finishes, silicone lubricant, adhesive, miscellaneous non-automotive, battery cleaners/protectors, brake quieters/cleaners, gasket adhesives/removers, belt lubricants/dressings, ignition wire dryers, starting fluid spray, tape recorder cleaner, and tire cleaner/paint(2). Methylcyclopentane has been identified as an emission from a textile floor covering with styrene-butadiene rubber backing at 40 °C(3).

NIOSH (NOES Survey 1981-1983) has statistically estimated that 1,053 workers are potentially exposed to methylcyclopentane in the USA(1). Exposure to methylcyclopentane will occur through ingestion and inhalation(SRC).

The average concn of methylcyclopentane in the air from gasoline vapors, to which petroleum industry workers may be exposed, for outside operators is 0.148 mg/cu m, for transport drivers is 0.560 mg/cu m, and for service attendants is 0.763 mg/cu m(1).

Methylcyclopentane was detected in the expired air from 4 out of 8 subjects(all male: 2 smokers and 2 non-smokers) at levels of 0.98 and 0.027 ug/hour for the non-smokers and 11.0 and 0.31 ug/hour for the smokers(1). Methylcyclopentane was detected in the expired air from a control, prediabetic, and diabetic population of 62 non-smokers(2). Methylcyclopentane has been identified in 4 out of 12 human breath samples from subjects in New Jersey (nine people) and in North Carolina (3 people)(3).

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ 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. Substances may be transported hot.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ Health: Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

/GUIDE 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ Public Safety: CALL Emergency Response Telephone Number ... . 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 128: FLAMMABLE LIQUIDS (NON-POLAR/WATER-IMMISCIBLE)/ 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 METHYLCYCLOPENTANE (8 total), please visit the HSDB record page.

UN 2298; Methylcyclopentane

49 081 74; Methylcyclopentane

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.

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.

Flammable Liquid