Ascorbic Acid Crystalline Powder

    DESCRIPTION

    AppearanceWhite or almost white crystalline powder

    SPECIFICATIONS

    Assay99 to 100.5%
    Colour
    (of solution)
    BY7
    IdentificationPositive reaction
    pHWith 2% water solution: 2.4 to 2.8
    With 5% water solution: 2.1 to 2.6
    Heavy metalsMax 10 ppm
    CadmiumMax 1 ppm
    Sulphated ash
    (Residue on ignition)
    Max 0.1 %
    Related SubstancesImpurity C: Max 0.15%
    Impurity D: Max 0.15%
    Any other unspecific impurities: Max 0.1%
    Total impurities: Max 0.2%
    ArsenicMax 3 ppm
    Loss on drying0.04 to 0.4%
    Melting pointAbout 190°C
    Residual solvents
    (Methanol)
    NMT 3000ppm
    LeadMax 2 ppm
    Clarity
    (of solution)
    Clear
    Oxalic AcidMax 0.2 %
    Specific Optical Rotation20.5 to 21.5°
    ZincMax 25 ppm
    MercuryMax 0.1 ppm
    Iron (Fe)Max 2 ppm
    CopperMax 5 ppm


    Direct Food Ingredients will ensure that any material supplied this specification will confirm to the above physical and chemical properties. However, we have no control over the use of the material and can accept no responsibility for problems caused by the customer's failure to ensure the material supplied is suitable for the intended use.

    This specification has been last modified on Thu 21 March 2013 (1546)

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