Butadiene (data page)

This page provides supplementary chemical data on 1,3-butadiene.

Properties

General
Name	1,3-Butadiene
CH2=CH-CH=CH2
Chemical formula	C4H6
Molar mass	54.09 g/mol
Synonyms	butadiene, biethylene, divinyl, erythrene, vinylethylene
CAS number	106-99-0
Phase behavior
Melting point	164.3 K (-108.9 °C)
Boiling point	268.8 K (-4.4 °C)
Triple point	164.2 K (-109.0 °C) ? bar
Critical point	425 K (152 °C) 43.2 bar
Structure
Symmetry group	C2h
Gas properties
ΔfH0	110.2 kJ/mol
S0	? J/mol·K
Cp	79.5 J/mol·K
Liquid properties
ΔfH0	90.5 kJ/mol
S0	199.0 J/mol·K
Cp	123.6 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 effects	Possible carcinogen.
Flash point	-85 °C
Autoignition temperature	418 °C
Explosive limits	2-12%
More info
Properties	NIST WebBook
MSDS	ICSC 0017
SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references