Identification ? I.R ? Colour test ? HPLC Concordant with WS. On heating, Violet vapour evolves The retention time of the major peak in the …
Identification I.R Colour test HPLC Concordant with WS. On heating, Violet vapour evolves The retention time of the major peak in the chromatogram of the sample solution corresponds to that observed in the chromatogram of the S.S.solution Specific Rotation (40% solution in water) - 4.6°~ - 5.2° Loss on drying Not more than 0.5% Residue on ignition Not more than 0.1% Free Aromatic Amine Not more than 200 ppm Free Iodine No red colour Free Iodide Not more than 0.001% Free Acid or Alkali Acid not more than 5mg of HCL equivalent. Alkali not more than 3mg of NaOHequivalent Heavy metals Not more than 0.001% Related compounds byHPLC Total impurities Not more than 0.25% Assay (on dry basis) 98.0% ~ 101.0%
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