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Synonym:	Alum
Cas no:	7784-31-8
Molecular formula:	Al₂(SO₄)₃â€¢16H₂O
Molecular weight:	630.38
Description:	White crystalline powder
Specifications
Solubility:	Very soluble in water, insoluble in ethanol
Identification:	Aluminium =+ve & sulphate =+ve
Water insoluble matter:	Max. 0.005%
Appearance of solution:	Dissolve 50 gm in carbon dioxide free water to produce 500 ml. The solution in colourless and not more than slight turbid.
Appearance of solution:
Ph of 5% solution:	2.5-4.0
Chloride:	Max. 0.001%
Ammonium:	Max. 0.02%
Copper:	Max. 0.0002 %
Iron:	Max 0.004%
Lead:	Max. 0.001%
Potassium:	Max 0.005%
Sodium:	Max. 0.02 %
Assay:	Min 98 0%

Aluminium Sulphate AR