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D-Tryptophan CAS:153-94-6 << 返回
AppearanceWhite or yellow crystalline powder
Specific Rotation [a]D20o+30.5 to +32.5 degree
State of Solution95.0%Min
Chloride (Cl)0.020%Max
Sulfate (SO4) 0.020%Max
Ammonium (NH4) 0.02% Max
Heavy Metals (Pb) 10ppmMax
Iron (Fe) 20ppmMax
Arsenic (As2O3) 1ppmMax
Other Amino Acids conforms
Loss on Drying0.20%Max
Residue in Ignition0.10%Max
Assay99.0% to 101.0%
PH 5.5 to 6.4
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