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    L-Tryptophan, CAS NO.: 73-22-3

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    Specification :

    L-Tryptophan, CAS NO.: 73-22-3
    Chemical Name: L-Tryptophan
    Molecular Formula: C11H12N2O2
    Molecular Weight: 204.23
    Characteristics: White to yellowish white crystalline powder
    Packing: 25kg/ drum, 25kg/ carton
    Quality Standard: aJI92/ USP28/ EP5/ FCCIV
    Specification
    Specific rotation[ a] D20° : -30.5° --32.5°
    State of solution: Clear
    ( Tranamittance) : min.95.0%
    Chloride( Cl) : max0.02%
    ammonium( NH4) : max0.02%
    Sulfate( SO4) : max0.020%
    Iron( Fe) : max20PPm
    Heavy metals( Pb) : max10PPm
    arsenic( as2O3) : max1PPm
    Other amio acids: conforms
    Loss on drying: max0.20%
    Residue on ignition( Sulfated) : max0.10%
    assay: 99.0-100.5%
    PH: 5.4-6.4
    mutualchem( at) gmail( dot) com



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