1,4-pentadiene

H224 (100%): Extremely flammable liquid and vapor [Danger Flammable liquids]

H304 (87.2%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]

P210, P233, P240, P241, P242, P243, P280, P301+P316, P303+P361+P353, P331, P370+P378, P403+P235, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 47 reports by companies from 2 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.

INHALATION: Move victim to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

EYES OR SKIN: Flush immediately with running water for at least 15 minutes. Remove and isolate contaminated clothing and shoes at the site. (USCG, 1999)

Fire Extinguishing Agents Not to Be Used: Water may be ineffective since this material floats.

Fire Extinguishing Agents: Small fires: dry chemical, CO2, water spray, fog or foam; large fires: water spray, for or foam. (USCG, 1999)

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)

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)

Wear self-contained positive pressure breathing apparatus and full protective clothing. (USCG, 1999)

1,4-pentadiene appears as a colorless liquid. Less dense than water and insoluble in water. Hence floats on water. (USCG, 1999)

78.8 °F at 760 mmHg (USCG, 1999)

-234.9 °F (USCG, 1999)

40 °F (USCG, 1999)

0.6608 at 68 °F (USCG, 1999) - Less dense than water; will float

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Highly flammable. Insoluble in water.

Hydrocarbons, Aliphatic Unsaturated

Polymerizable Compounds

Highly Flammable

Polymerizable

1,4-PENTADIENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release gaseous hydrogen. Can undergo exothermic polymerization reactions in the presence of various catalysts (such as acids) or initiators. May undergo autoxidation upon exposure to the air to form explosive peroxides. Violent explosions have occurred at low temperatures in ammonia synthesis gas units. These explosions have been traced to the decomposition of addition products between dienes such as this one and oxides of nitrogen [Bretherick, 1995].

Flammable Liquid