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ItemsStandardAnalysis dataAppearanceWhite crystals or crystalline powderconformsSpecific rotation[α]20/D(C=1 Acetic acid)+9.3°+ 2°8.14°Melting point 159 to 168℃160℃Heavy metal(Pb)Not more than 20ppm<20ppmArsenic (As2O3)Not more than 2ppm<2ppmLoss on DryingNot more than 0.50%0.18%Residue on ignitionNot more than 0.30%0.1%Assay98.0% to 102%98.6%
