CAS No.: 10043-01-3

H.S. Code: 28332200
Formular: Al₂(SO₄)₃

M.W.: 53.5

Specifications:

Al₂O₃    16-18%

As₂O₃    0.01%max

Fe₂O₃    0.35%max

Free acid    nil

Water solution  0.1%max

Size   1-10cm

Sulphate  0.02%max

Description: Aluminum Sulfate (Alum) is a white crystalline product which is almost insoluble in anhydrous alcohol, but readily soluble in water. It decomposes to aluminium oxide on heating or on burning (above 770) producing toxic and corrosive fumes including sulfur oxides. Its can exist with a variable number of water molecules (n close to 18), the form being Al2(SO4)3.H2O. It dissolves with clear water at the concentration of 1 - 5%.

Aluminum Sulfate can exist with varying proportions of water, the common form being Al2(SO4)3.18H2O. It is almost insoluble in anhydrous alcohol, but readily soluble in water. Above 770 decomposition to aluminium oxide is observed.

Application: Aluminium sulfate is mainly used in water treatment, dyeing, leather tanning and in the production of other aluminium compounds. The solution in water is a medium strong acid reacts with alkalis and attacks many metals in presence of water. It is widely applied as a coagulant for clarification of water treatment for industrial and drinking and in dyeing, leather tanning, in paper production, as a mordant in dyeing, and as a starting material for the production of other aluminium compounds. Another application for hydrated alumina is for the manufacture of zeolites.

Packing: in 50kg p.p.bag