Quinidine Sulfate, Dihydrate, USPTest Specification Min Max ASSAY (ANHYDROUS BASIS) 99. 0 101. 0% SPECIFIC ROTATION [a][@D@] +275 to +288 +275 to +288 WATER DETERMINATION 4. 0 5. 5% RESIDUE AFTER IGNITION 0. 1% ORGANIC IMPURITIES TO PASS TEST TO PASS TEST CHLOROFORM ALCOHOL INSOLUBLE SUBSTANCES 0. 1% ELEMENTAL IMPURITIES AS REPORTED AS REPORTED DIHYDROQUINIDINE SULFATE 20. 0% IDENTIFICATION TO PASS TEST TO PASS TEST EXPIRATION DATE DATE OF MANUFACTURE APPEARANCE RESIDUAL SOLVENTS TO