Aluminium hydroxide or alumina tri hydrate (ATH) is the hydrated oxide of aluminium. Alumina hydrate is separated from bauxite ore using the Bayer process, with average particle size ranging from 80-100 micron. The block crystals of alumina hydrate impart good chemical reactivity. Alumina hydrate can react with a base as well as an acid, and finds use in many applications as raw material.

It is typically used as a raw material for the production of other alumina based chemicals such as calcined alumina, aluminium sulfate, poly aluminium chloride (PAC), aluminium fluoride and synthetic zeolite. Its chemical formula is Al2O3•3H2O or Al(OH)3.

Aluminium hydroxide or alumina trihydrate is the hydrated oxide of aluminium. Alumina trihydrate is separated from ore bauxite using Bayer process with average particle size ranging from 80-100 micron. The blocky crystals of alumina trihydrate impart good reactivity. Alumina trihydrate can react with a base as well as an acid and finds many applications as raw material. Aluminium hydroxide or alumina hydrate is used in the manufacture of many inorganic chemicals like:

• Non- ferric alum
• Poly aluminium chloride
• Aluminium fluoride
• Sodium aluminate
• Catalysts
• Glass
• Aluminium hydroxide gel