L-Histidine base


    AppearanceWhite or almost white crystalline powder or colourless crystals


    Assay98.5 to 101.5%
    IdentificationAs per USP28
    Chloride (Cl)Max 0.05%
    Sulphate (SO4)Max 0.03 %
    pH7.0 to 8.5
    Heavy metalsMax 0.0015 %
    Chromatographic purity
    (Residual Solvent)
    As per USP28
    Loss on dryingMax 0.2 %
    Specific Rotation+12.6 to +14.0
    Residue on ignitionMax 0.4 %
    Iron (Fe)Max 0.003 %
    StoragePreserve in well closed containers and protected from light


    Total plate countMax 1000 cfu/g
    YeastsMax 100 cfu/g
    MouldsMax 100 cfu/g
    Staphylococcus aureusNegative/10g
    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 Wed 6 October 2010 (187)

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