ʻO ka huahana he mea keʻokeʻo, spherical porous mea me ka waiwai o ka non-toxic, odorless, insoluble i ka wai a me ka ethanol.He ʻano like ka nui o ka ʻāpana, ʻoluʻolu ka ʻili, kiʻekiʻe ka ikaika mechanical, ikaika ka hiki o ka hoʻoheheʻe ʻana i ka wai a ʻaʻole i ʻoki ʻia ka pōleʻa ma hope o ka lawe ʻana i ka wai.
ʻO ka alumina no ka hydrogen peroxide he nui nā kaila capillary a me kahi ākea nui, hiki ke hoʻohana ʻia e like me adsorbent, desiccant a me catalyst.I ka manawa like, ua hoʻoholo ʻia e like me ka polarity o ka mea adsorbed.He pilina ikaika kona no ka wai, oxides, acetic acid, alkali, etc. Activated alumina he ʻano micro-water deep desiccant a me ka adsorbent no ka adsorbing polar mole.