CAS NO: 21645-51-2

Used primarily in glazes as a source of Alumina. Often preferred over the oxide (Calcined Alumina) form because it promotes glaze adhesion and has a capacity to remain suspended in a glaze. It is also used in salt glaze, bungs, and kiln batt wash.

Alumina is added to glass formulations to improve mechanical strength, hardness, thermal and optical properties.