... Al(OH)3, ATH, sometimes erroneously called Hydrate of alumina, is found in nature as the mineral gibbsite (also ... temperature under carefully controlled conditions is known as activated alumina and is used as a desiccant, an adsorbent, ... , polyaluminium chloride, aluminium chloride, zeolites, sodium aluminate, activated alumina, aluminium nitrate.Use as a fire retardant:Aluminium hydroxide also ...