TEST

Specifications

Appearance  

Off-white to light brown powder

Identification

HPLC retention time correspond to WRS

Absorption spectrum of the sample should be concordant with D-Tryptophan standard

Specific rotation  

+30.0° ~ +33.0°(C1,Water)

Loss on drying

≤0.5%

Related substances

Highest individual impurity≤0.50%

Total impurities ≤1.0%

Assay

≥98.0%