Item
Standard
Appearance
White crystals or crystalline powder
Transmittance
Not less than 95.0%
Heavy metal(Pb)
Not more than 20ppm
Arsenic(As2O3)
Not more than 2ppm
Other amino acids
Chromatographically
not detectable
Loss on drying
Not more than 0.50%
Residue on ignition (sulfated)
Not more than 0.30%
Assay
98.0to102.0%
pH
1.7to3.0
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