1,5-HEXADIENE Chemical Properties

Melting point:

−141 °C(lit.)

Boiling point:

60 °C(lit.)

Density 

0.692 g/mL at 25 °C(lit.)

vapor pressure 

367 mm Hg ( 37.7 °C)

refractive index 

n20/D 1.404(lit.)

Flash point:

−17 °F

CAS DataBase Reference

42296-74-2(CAS DataBase Reference)

EPA Substance Registry System

Hexadiene (42296-74-2)

Safety Information

Hazard Codes 

F,Xn

Risk Statements 

11-36/37/38-65

Safety Statements 

16-62

RIDADR 

UN 2458 3/PG 2

WGK Germany 

3

RTECS 

MM1997800

MSDS

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• Language:English Provider:ACROS
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1,5-HEXADIENE Usage And Synthesis

General Description

A clear colorless liquid with a petroleum-like odor. Flash point below 0°F. Less dense than water and insoluble in water. Hence floats on water. Vapors heavier than air.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

1,5-HEXADIENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions. May undergo autoxidation upon exposure to the air to form explosive peroxides. Violent explosions at low temperatures in ammonia synthesis units have been traced to the addition products of dienes and nitrogen dioxide [Bretherick, 5th Ed., 1995].

Health Hazard

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.

Fire Hazard

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. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

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