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Ascorbic Acid (Vitamine C)

    详细说明

    ASCORBIC ACID (VITAMIN C) (50-81-7)
    Formula: C₆H₈O₆
    M.W.: 176.13
    Appearance: White or almost white crystals, crystalline powder
    Specifications: USP42
      Assay: 99.0%-100.5%
      Identification: Positive Reaction
      Clarity of Solution: Clear
      Color of Solution: BY7 max
      Residue on ignition: 0.1% max
      Specific Optical Rotation: +20.5° - +21.5°
      PH (2% in Water): 2.4 - 2.8
      PH (5% in Water): 2.1 - 2.6
      Melting point: 190 - 192℃
      Heavy Metals (as Pb): 10ppm max
      Copper: 5ppm max
      Iron: 2ppm max
      Arsenic: 2ppm max
      Lead: 0.5ppm max
      Cadmium (Cd): 0.5ppm max
      Mercury: 0.1ppm max
      Impurity E: 0.2% max
      Impurities C,D: 0.15% max
      Unspecified Impurities: 0.1% max
      Residual Solvents (as methand): 3000ppm max
      Loss on Drying: 0.4% max
      Total Plate Counts: 1000cfu/g max
      Yeasts and Moulds: 100cfu/g max
      Escherichia coli: negative in 10g
      Salmonella: negative in 25g
      Staphylococcus Aureus: negative in 25g
    Package: in 25kg cartons (20MT/FCL).
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