Formamidine acetate is a white crystalline organic salt formed by the neutralization of formamidine and acetic acid, with the molecular formula C₃H₈N₂O₂. It is freely soluble in water and has strong hygroscopicity. It is stable under normal temperature and pressure. It is mainly used as an organic synthesis intermediate and condensation reagent, and is widely applied in the pharmaceutical and chemical industries.

1. Pharmaceutical intermediate: Used in the synthesis of pyrimidine and imidazole heterocyclic compounds; serves as a key condensation reagent for the synthesis of various active pharmaceutical ingredients (APIs).

2. Organic synthesis: Acts as a formamidinating reagent for the preparation of nitrogen-containing heterocycles and amidine compounds.

3. Chemical raw material: Used in the synthesis of fine chemicals such as pesticides and dyestuffs.