1,4-PENTADIENE Property

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

Hazard Codes 

F+,Xn

Risk Statements 

12-65

Safety Statements 

16-23-62

RIDADR 

UN 3295 3/PG 1

WGK Germany 

3

HazardClass 

3.1

PackingGroup 

II

HS Code 

29012900

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H224Extremely flammable liquid and vapour

H304May be fatal if swallowed and enters airways

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

1,4-PENTADIENE Chemical Properties,Usage,Production

Chemical Properties

colourless liquid

Uses

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.]