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ITEM
|
STANDARD
|
Appearance
|
White or almost white, crystalline powder or colourless crystals
|
Assay
|
98.5-101.0
|
pH
|
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
|
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