1,4-PENTADIENE

Synonym(s):Allylethylene

CAS NO.：591-93-5
Empirical Formula: C5H8
Molecular Weight: 68.12
MDL number: MFCD00008665
EINECS: 209-736-9
SAFETY DATA SHEET (SDS)
Update Date: 2026-01-13 11:24:18

What is 1,4-PENTADIENE?

Chemical properties

colourless liquid

The Uses of 1,4-PENTADIENE

1,4-Pentadiene can be used to obtain bioinsecticidal composition.

General Description

A colorless liquid. Less dense than water and insoluble in water. Hence floats on water.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

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].

Health Hazard

Vapor may cause dizziness or suffocation. Contact may irritate skin and eyes.

Purification Methods

Distil it from NaBH4. Purify it by preparative gas chromatography or distillation and stabilize it with 0.1% of 2,6-di-tert-butyl-p-cresol. [Reimann et al. J Am Chem Soc 108 5527 1986, Beilstein 1 IV 998.]

Properties of 1,4-PENTADIENE

Melting point:	-148 °C
Boiling point:	26 °C(lit.)
Density	0.659 g/mL at 25 °C(lit.)
vapor pressure	11.91 psi ( 20 °C)
refractive index	n20/D 1.389(lit.)
Flash point:	40 °F
storage temp.	0-6°C
solubility	Soluble in acetone, alcohol, benzene, and ether (Weast, 1986)
form	Liquid
pka	>14 (Schwarzenbach et al., 1993)
color	Clear colorless
Water Solubility	558 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966)
BRN	1696934
Henry's Law Constant	0.120 at 25 °C (Hine and Mookerjee, 1975)
Stability:	Stable. Highly flammable. Note low boiling point and low flash point. Incompatible with strong oxidizing agents.
CAS DataBase Reference	591-93-5(CAS DataBase Reference)
EPA Substance Registry System	1,4-Pentadiene (591-93-5)

Safety information for 1,4-PENTADIENE

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Health Hazard GHS08
GHS Hazard Statements	H224:Flammable liquids H304:Aspiration hazard
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P403+P233:Store in a well-ventilated place. Keep container tightly closed.