維生素 B1

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外觀	White or almost white, crystalline powder or colourless crystals
Identification	IR,Characteristic Reaction and Test of chlorides
Assay	98.5-101.0
pH 值	2.7-3.3
Absorbance of solution	=<0.025
Solubility	Freely Soluble in Water,Soluble in Glycerol,Slightly Soluble in Alcohol
Appearance of solution	Clear and not more than Y7
Sulphates	=<300PPM
Limit of nitrate	No brown ring is produced
Heavy metals	=<20 PPM
Related substances	Any impurity % =<0.4
Water	=<5.0
Sulphated ash/Residueon ignition	=<0.1
Chromatographic purity	=<1.0

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