Metformin Hydrochloride Product name: Metformin Hydrochloride Other name: 1,1-Dimethylbiguanide hydrochloride CAS No.: 1115-70-4 Assay: 99% Packing: 25kg/drum M.F.: C4H12ClN5 M.W.: 165.6246 Reference Standard: CP Appearance: White crystal or crystalline powder