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      Ascorbic Acid

      CAS number: 50-81-7

      Molecular formula:

      molecular weight:

      Chemical structure:


      Product name:  Ascorbic Acid
      Expiry Date:  Three years
      Inspection Standard:  BP2013, E300, USP36, FCC8, EP 7.
      Tests Standards Results
      Appearance White crystalline powder White crystalline powder
      Identification Positive Positive
      Clarity of solution Clear Clear
      Color of solution ≤BY7 <by7< td="">
      Assay 99.0~100.5% 99.5%
      Loss on Drying ≤0.4% 0.05%
      Residue on ignition 0.1% 0.03%
      Sulphate Ash 0.1% 0.03%
      Specific rotation +20.5°~+21.5° +20.92°?
      pH(with 2% water solution) 2.4-2.8 2.59
      PH(with 5% water solution) 2.1-2.6 2.35
      Melting range About 190℃ 191℃
      Heavy metals ≤3ppm <3ppm< td="">
      Iron ≤2ppm <2ppm< td="">
      Copper ≤5ppm <5ppm< td="">
      Impurity E ≤0.2% <0.2%< td="">
      Arsenic ≤1ppm <1ppm< td="">
      Lead ≤2ppm <2ppm< td="">
      Cadmium ≤1ppm <1ppm< td="">
      Mercury ≤1ppm <1ppm< td="">
      Organic volatile impurities Meets the requirements conform
      Related Substances ImpurityC≤0.15% Complies
      Any Other Unspecific Impurities
      Total Impurity≤0.2%
      Total Plate Count ≤1,000cfu/g <1,000cfu/g
      Conclusion: According to BP2013, E300, USP36, FCC8, EP 7.