C2H2

C2H2 may mean:

Molecular formulae
The molecular formula C2H2 (molar mass: 26.04 g/mol, exact mass: 26.01565 u) may refer to:


 * Acetylene (or ethyne)
 * Methylidenecarbene
 * Vinylidene group

Transcription factors

 * C2H2 zinc finger, short for Cys2His2 a class of transcription factors with the small protein structural motif stabilised with Zinc ions