2,3-DIMETHYL-1,3-BUTADIENE Chemical Properties

Melting point:

-76 °C (lit.)

Boiling point:

68-69 °C (lit.)

Density 

0.726 g/mL at 25 °C (lit.)

vapor pressure 

269 mm Hg ( 37.7 °C)

refractive index 

n20/D 1.438(lit.)

Flash point:

−8 °F

storage temp. 

2-8°C

form 

Liquid

color 

Clear colorless

Water Solubility 

Miscible with chloroform. Immiscible with water.

Merck 

14,3238

BRN 

605285

Dielectric constant

2.1000000000000001

CAS DataBase Reference

513-81-5(CAS DataBase Reference)

EPA Substance Registry System

1,3-Butadiene, 2,3-dimethyl- (513-81-5)

Safety Information

Hazard Codes 

F

Risk Statements 

11

Safety Statements 

16-23

RIDADR 

UN 3295 3/PG 2

WGK Germany 

3

F 

9

TSCA 

Yes

HazardClass 

3

PackingGroup 

II

HS Code 

29012900

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

2,3-DIMETHYL-1,3-BUTADIENE Usage And Synthesis

Chemical Properties

Clear colorless liquid

Uses

2,3-Dimethyl-1,3-butadiene undergoes Diels Alder cycloaddition reaction and it also participates in polymerization reactions. It is also involved in manufacturing of synthetic rubber.

General Description

2,3-Dimethyl-1,3-butadiene (DMBD) is a conjugated diene. It undergoes Diels Alder cycloaddition reaction with 2-thio-3-chloroacrylamides under thermal, catalytic and microwave conditions. It undergoes thermal [4+2] cycloaddition reaction with 3-acetyl-, 3-carbamoyl and 3-ethoxycarbonylcoumarins under solvent free conditions. DMBD participates in polymerization reactions in the presence of iron dichloride complexes based catalysts.

Purification Methods

Distil it from NaBH4, and purify it by zone melting. [Beilstein 1 IV 1023.]

2,3-DIMETHYL-1,3-BUTADIENE(513-81-5)Related Product Information

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