C4H6
# C4H6

The molecular formula $C_4H_6$ (molar mass: 54.09 g/mol) may refer to:

* 1,3-Butadiene
* 1,2-Butadiene
* Bicyclobutane
* Cyclobutene
* Dimethylacetylene (2-butyne)
* 1-Methylcyclopropene
* 3-Methylcyclopropene
* Methylenecyclopropane
* Trimethylenemethane
* 1-butyne
