This page provides supplementary chemical data on 1,3-butadiene. + PropertiesGeneral Name 1,3-ButadieneCH2=CH-CH=CH2 Chemical formula C4H6 Molar mass 54.09 g/mol Synonyms butadiene, biethylene, divinyl, erythrene, vinylethylene CAS number 106-99-0Phase 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 barStructure Symmetry group C2h Gas properties ΔfH0 110.2 kJ/mol S0 ? J/mol·K Cp 79.5 J/mol·KLiquid properties ΔfH0 90.5 kJ/mol S0 199.0 J/mol·K Cp 123.6 J/mol·K Liquid density 0.64 ×103 kg/m3Safety 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 0017SI units were used where possible. Unless otherwise stated, standard conditions were used.
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