Item	STANDARD
Characteristics	A white crystalline or crystammine powder acid taste and slightly agreeable.
Specific rotation [a]D20°	+30.5 °~ +32.5°
Chloride (Cl)	0.02% max
Ammonium (NH4)	0.02% max
Sulfate (SO4)	0.02% max
Iron (Fe)	10ppm max
Heavy metals (Pb)	10ppm max
Cadmium	1ppm max
Mercury	0.1ppm max
Arsenic (AS2O3)	1ppm max
Other amino acids	Conform to starndard.
Loss on drying	0.5% max
Residue on ignition(sulfated)	0.10% max
Assay:	98.5% to 100.5%
PH	3.0 to3.5

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