Items

Specifications

Description

White crystals or crystalline powder

Assay, %

98.0 ~ 102.0

Identification

Infrared absorption spectrum

Specific rotation, °

+5.6 ~ +8.9

State of solution, %

≥98.0

Heavy metals (Pb), ppm

≤10

Arsenic (As₂O₃) , ppm

≤1

Other amino acids

Chromatographically not detectable

Loss on drying, %

≤1.0

Residue on ignition (sulfated) , %

≤0.1

PH

1.5 ~ 2.0