Butadiene (data page)

Properties

General

Name1,3-Butadiene

CH2=CH-CH=CH2

Chemical formula C4H6
Molar mass54.09 g/mol
Synonyms butadiene, biethylene, divinyl, erythrene, vinylethylene
CAS number106-99-0

Phase behavior

Melting point 164.3 K (-108.9 °C)
Boiling point268.8 K (-4.4 °C)
Triple point164.2 K (-109.0 °C)

? bar

Critical point425 K (152 °C)

43.2 bar

Structure

Symmetry groupC2h

Gas properties

ΔfH0110.2 kJ/mol
S0? J/mol·K
Cp79.5 J/mol·K

Liquid properties

ΔfH090.5 kJ/mol
S0199.0 J/mol·K
Cp123.6 J/mol·K
Liquid density 0.64 ×103 kg/m3

Safety

Acute effects Possible irritation to skin and mucous membranes. Inhalation of concentrated vapors causes drowsiness and CNS depression.
Chronic effectsPossible carcinogen.
Flash point-85 °C
Autoignition temperature418 °C
Explosive limits2-12%

More info

Properties NIST WebBook
MSDS ICSC 0017

SI units were used where possible. Unless otherwise stated, standard conditions were used.

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