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ITEMS	STANDARD
Appearance	A white or almost white, crystalline powder or colourless crystals.
Solubility	Freely soluble in water,practically insoluble in alcohol.
Identification test (A,B)	Up to the STANDARD
Appearance of solution	Clarity of solution:5% water solution should be clear
Appearance of solution	Colour of solution:5% water solution should be not more intensively coloured than reference solution BY6
Specific optical rotation	+14.0° to +16.0°
Assay	98.5-101.0%
Chlorides	200ppm max
Sulphates	300ppm max
Ammonium	200ppm max
Iron	10ppm max
Heavy metals	10ppm max
Loss on drying	0.5% max
Sulphated ash	0.1% max
Ninhydrin-positive substances (TLC)	Up to the STANDARD