Metformin Hydrochloride, BPTest Specification Min Max ASSAY (DRIED BASIS) 98. 5 101. 0% APPEARANCE OF SOLUTION TO PASS TEST TO PASS TEST IMPURITY F TO PASS TEST TO PASS TEST LOSS ON DRYING 0. 5 % RELATED SUBSTANCES TO PASS TEST TO PASS TEST SULFATE ASH 0. 1 % ELEMENTAL IMPURITIES: NICKEL (Ni) AS REPORTED AS REPORTED IDENTIFICATION TO PASS TEST TO PASS TEST EXPIRATION DATE DATE OF MANUFACTURE APPEARANCE RESIDUAL SOLVENTS TO PASS TEST TO PASS TEST