C2O4
# C2O4

The molecular formula $C_2O_4$ (molar mass: 88.02 g/mol) may refer to:

* Oxalate (ethanedioate)
* Dioxetanediones:
   * 1,2-Dioxetanedione (1,2-dioxetane-3,4-dione)
   * 1,3-Dioxetanedione (1,3-dioxetane-2,4-dione)
