Acetoguanamine is an organic compound with the chemical formula (CNH<sub>2</sub>)<sub>2</sub>CCH<sub>3</sub>N<sub>3</sub>. It is related to melamine but with one amino group replaced by methyl. Acetoguanamine is used in the manufacturing of melamine resins. Unlike melamine ((CNH<sub>2</sub>)<sub>3</sub>N<sub>3</sub>), acetoguanamine is not a crosslinker. The "aceto" prefix is historical, the compound does not contain an acetyl group. A related compound is benzoguanamine.
The compound is prepared by condensation of cyanoguanidine with acetonitrile:
The (oral, rats) of acetoguanamine is 2740 mg/kg.