... (OH)3, ATH, sometimes erroneously called Hydrate of alumina, is found in nature as the mineral gibbsite (also ... elevated 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 ...