Calcium Formate Powder 98% Calcium formate, molecular formula: Ca(HCOO)2, molecular weight: 130.12,H.S. CODE: 29151200, CAS NO.:544-17-2,Bulk density: 900-1000kg/m3,Specific gravity: 2.023 (20â??). Free flowing Calcium Formate,at normal temperature, it is a white crystalline powder, bitter and non toxic, with slight moisture absorption. It can be mutually dissolved with water, nonflammable and nonexplosive.