Crotonic anhydride Chemical Properties

Melting point:

-20°C

Boiling point:

248 °C(lit.)

Density 

1.04 g/mL at 25 °C(lit.)

vapor pressure 

1 hPa (25 °C)

refractive index 

n20/D 1.473(lit.)

Flash point:

231 °F

storage temp. 

Store below +30°C.

solubility 

soluble in Ether

form 

clear liquid

color 

Colorless to Light orange to Yellow

CAS DataBase Reference

623-68-7(CAS DataBase Reference)

EPA Substance Registry System

2-Butenoic acid, anhydride (623-68-7)

Safety Information

Hazard Codes 

C

Risk Statements 

34

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3265 8/PG 3

WGK Germany 

3

RTECS 

GQ6125000

Autoignition Temperature

290 °C

HS Code 

2916 19 95

HazardClass 

8

PackingGroup 

III

Hazardous Substances Data

623-68-7(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 2061 mg/kg

MSDS

• Language:English Provider:SigmaAldrich

Crotonic anhydride Usage And Synthesis

Chemical Properties

Colorless to pale yellow liquid

Synthesis Reference(s)

Tetrahedron Letters, 33, p. 593, 1992 DOI: 10.1016/S0040-4039(00)92318-9

Safety Profile

Moderately toxic by ingestion. A skin irritant. When heated to decomposition it emits acrid smoke and irritating fumes.

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