Ammonium Formate, CAS 540-69-2, Item 599. Ammonium Formate is an ammonium salt from formic acid with a chemical formula of HCOONH4 or CH5NO2. Ammonium Formate appears as white monoclinic crystals and has a slight ammonia odor. The molar mass of Ammonium Formate is 63.056 g/mol-1 and has a density…