C4H8
# C4H8

The molecular formula $C_4H_8$ (molar mass: 56.11 g/mol) may refer to:

* Butenes (butylenes)
   * 1-Butene, or 1-butylene
   * 2-Butene
   * Isobutylene
* Cyclobutane
* Methylcyclopropane
