Pharmaceutical Intermediate
L-Tryptophan
Description
CAS No.: 73-22-3
Appearance White crystals or crystalline
powder
Specific rotation -29.4~-32.8°
PH 5.5~7.0
Loss on drying ≤0.30%
Residue on ignition ≤0.10%
Chloride ≤0.05%
Sulfate ≤0.03%
Iron ≤30ppm
Heavy metals ≤15ppm
Chromatographic purity Individual impurity
not more than 0.5% and
total impurities not
more than 2.0%
Assay 98.5~101.5%
The Product Conforms to USP26
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NINGBO CREATE BIOLOGICAL PROJECT CO.,LTD
amino acids
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ningbo, Zhejiang
China, 315206
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