Crotonaldehyde

Product Name:

Crotonaldehyde

Synonyms:

BUTENAL;BETA-METHYLACROLEIN;CROTONALDEHYDE;CROTINALDEHYDE;(E)-2-BUTENAL;2-BUTENAL;2-BUTEN-1-AL;TRANS-2-BUTENAL

CAS:

123-73-9

MF:

C4H6O

MW:

70.09

Product Categories:

Pharmaceutical Intermediates;Aldehydes;C1 to C6;Carbonyl Compounds;Building Blocks;C1 to C6;Carbonyl Compounds;Chemical Synthesis;Organic Building Blocks

Mol File:

123-73-9.mol

Chemical Properties

melting point

−76 °C(lit.)

boiling point

104 °C(lit.)

density

0.853 g/mL at 20 °C(lit.)

vapor density

2.41 (vs air)

vapor pressure

32 mm Hg ( 20 °C)

refractive index

n20/D 1.437

Fp

48 °F

storage temp.

2-8°C

Water Solubility

150 g/L (20 ºC)

Usage And Synthesis

Chemical Properties

clear liquid

General Description

Water-white to straw-colored liquid with a pungent, suffocating odor. Used as a chemical intermediate in a variety of industrial processes (surfactants, textiles, paper, fuels, insecticides, leather tanning, etc.). Used in chemical warfare.

Air & Water Reactions

Highly flammable.

Reactivity Profile

Crotonaldehyde is an aldehyde. Crotonaldehyde can react violently with strong oxidizing reagents, e.g., reaction with conc. nitric acid leads to instantaneous ignition. In contact with strong acids or bases Crotonaldehyde will undergo an exothermic condensation reaction. Reaction with 1,3-butadiene is particularly violent.

Health Hazard

Although slightly less toxic, crotonaldehyde is similar chemically and toxicologically to acrolein, which is rated as extremely toxic. Toxic concentrations for human inhalation have been reported at 12 mg/m3/10 minutes. Irritant dose to human eye is 45 ppm.

Fire Hazard

Vapors form explosive mixtures in air or in sewers. Hazardous peroxides and acids emitted when heated to decomposition. Avoid nitric acid. Unstable, avoid oxygen, heat, elevated pressures. Hazardous polymerization may occur. Avoid contact with alkaline materials such as caustic ammonia or amines, or at elevated temperatures.