{{DISPLAYTITLE:C<sub>4</sub>H<sub>6</sub>}} {{Related molecular formulas|C=4|H=6}} The molecular formula '''C<sub>4</sub>H<sub>6</sub>''' (molar mass: 54.09 g/mol) may refer to:
* Bicyclobutane * 1,3-Butadiene * 1,2-Butadiene * 1-Butyne * Cyclobutene * Dimethylacetylene (2-butyne) * 1-Methylcyclopropene * 3-Methylcyclopropene * Methylenecyclopropane * Trimethylenemethane
{{Molecular formula index}}