Ammonium Alum USP

Ammonium Alum is a white crystalline double sulfate usually encountered as the dodecahydrate. It is used in small amounts in a variety of niche applications.


Ammonium Alum is used in water purification, in vegetable glues, in porcelain cements, in deodorants, in tanning, dyeing and in fireproofing textiles. It is a common ingredient in animal repellant sprays.


Chemical Name: Ammonium Alum
Mol. Formula: AlNH4(SO4)2.12H2O
Mol. Weight: 453.32 g/mol
CAS No.: 7784-26-1


General Specifications

Test Specification…USP
Appearance It appears as a colorless crystalline substance, odorless
Solubility Soluble in water and glycerol, insoluble in alcohol
Appearance of solution The solution is clear and colorless
Loss on drying Between 45% and 48%
Alkalies and alkaline earths Maximum 0.5%
Heavy metals Maximum 0.002%
Iron Passes test
Organic volatile impurities Passes test
Residual solvents Passes test
Assay Not less than 99% and not more than 100.5%


Shelf life, Storage and Packing

It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.


GLP, cGMP (FDA) Approved, ISO 9001, ISO 14001, ISO 45001, ISO 17025, ISO 22000, FSSC 22000, FSSAI, Halal and Kosher certified.
We observe WHO Good manufacturing practice and Good laboratory practice.

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