White crystals or crystalline powder


    Assay98.5 to 101.5%
    Concordant with the reference spectrum
    Ninhydrin-positive substancesComply with the provision
    Organic Volatile ImpuritiesMeets the requirements
    Chloride (Cl)Max 0.02 %
    Sulphate (SO4)Max 0.02 %
    Ammonium (NH4)Max 0.01 %
    pH5.9 to 6.9
    Heavy metalsMax 10 ppm
    ArsenicMax 1 ppm
    Chromatographic purityConforms
    Loss on dryingMax 0.30 %
    LeadMax 3 ppm
    Specific Rotation [°]D20-84.5 to -86.0
    State of Solution
    (Transmittance T430)
    Clear & Colourless; Min 98.0%
    Residue on ignitionMax 0.10 %
    Other Amino AcidsMax 0.5 %
    MercuryMax 0.1 ppm
    Iron (Fe)Max 10 ppm


    Total plate countMax 1000 cfu/g
    YeastsMax 100 cfu/g
    MouldsMax 100 cfu/g
    Staphylococcus aureusNegative
    Bacterial EndotoxinNegative
    Escherichia ColiNegative

    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 Tue 21 December 2010 (339)

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