title: Butadiene (data page)
text: # Butadiene (data page)
  
  Properties :
  
  | General ||
  | - | - |
  | Name | 1,3-Butadiene |
  | $CH_2=CH-CH=CH_2$ ||
  | Chemical formula | $C_4H_6$ |
  | 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 | $C_{2h}$ |
  | Gas properties ||
  | $Δ_fH^0$ | 110.2 kJ/mol |
  | $S^0$ | ? J/mol·K |
  | $C_p$ | 79.5 J/mol·K |
  | Liquid properties ||
  | $Δ_fH^0$ | 90.5 kJ/mol |
  | $S^0$ | 199.0 J/mol·K |
  | $C_p$ | 123.6 J/mol·K |
  | Liquid density | 0.64 $×10^3$ $kg/m^3$ |
  | 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 ||
  