ALUMINIUM POTASSIUM SULPHATE DODECAHYDRATE AR/ACS

Short Name: ALUMINIUM POTASSIUM SULPHATE DODECAHYDRATE

Other Names: Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate

Conforms to BP, Ph Eur, USP

Chemical Specifications

Appearance : White crystalline powder

Assay (complexometric) : 99.0-100.5%

Identification : To comply USP, BP test

Appearance of solution : Passes test

Insoluble matter : Max 0.005%

pH (10% solution in water) : 3.0 -.3.5

Chloride (Cl) : Max 0.0005%

Ammonium (NH4) : Max 0.005%

Arsenic (As) : Max 0.0002%

Copper (Cu) : Max 0.0005%

Iron (Fe) : Max 0.0005%

Heavy metal (as Pb) : Max 0.001%

Sodium (Na) : Max 0.02%

Loss on drying (at 400°C) : 43 - 46%