ʻO ke ʻano o ka aluminisilica gelhe melemele māmā a keʻokeʻo paha me ka ʻano molekiko kemika mSiO2 • nAl2O3.xH2O. Nā waiwai kemika paʻa. ʻAʻole hoʻopau ʻia, ʻaʻole hiki ke hoʻoheheʻe ʻia ke kumu ikaika a me ka waika hydrofluoric. Ke hoʻohālikelike ʻia me ka silica gel porous maikaʻi, ua like ka mana adsorption o ka haʻahaʻa haʻahaʻa (e like me RH = 10%, RH = 20%), akā ʻo ka mana adsorption o ka haʻahaʻa kiʻekiʻe (e like me RH = 80%, RH = 90%). ʻO 6-10% kiʻekiʻe ma mua o ka silica gel porous maikaʻi, a ʻo ke kūpaʻa wela (350 ℃) he 150 ℃ kiʻekiʻe ma mua o ka silica gel porous maikaʻi.