Is the hydrated oxide of aluminium. Alumina trihydrate is separated from ore bauxite u 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: Glass, Ceramics, non ferric alum. water treatment and many more Alumina hydrate is available in wet as well as dry form.