ALUMINIUM POTASSIUM SULPHATE DODECAHYDRATE

ALUMINIUM POTASSIUM SULPHATE DODECAHYDRATE AR/ACS

Conforms to BP, Ph Eur, USP
Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate

Article No.

00970

Grade

AR/ACS

Purity

99%

CAS No.

7784-24-9

Molecular Formula

AlK(SO₄)₂.12H₂O

Molecular Weight

474.38

H.S. Code

2833.3030

Shelf Life

60 Months

MSDS

Certificate of Analysis (COAs)

Physical state at 20 °C

Solid

Colour

White crystalline

Odour

Odorless

pH value

3.3

Melting point/ Freezing point [°C]

92 °C

Boiling point [°C]

200°C

Density [g/cm3]

1.757

Solubility in water [% weight]

14% in water

Appearance	White crystalline powder/crystals
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%