Cov khoom yog cov khoom siv dawb, kheej kheej kheej kheej nrog cov khoom tsis muaj tshuaj lom, tsis muaj ntxhiab, insoluble hauv dej thiab ethanol.Qhov loj me me yog qhov sib xws, qhov saum npoo yog du, lub zog txhua yam yog siab, qhov muaj peev xwm ntawm cov dej noo nqus yog muaj zog thiab lub pob tsis sib cais tom qab nqus dej.
Alumina rau hydrogen peroxide muaj ntau txoj hauv kev capillary thiab thaj chaw loj, uas tuaj yeem siv ua adsorbent, desiccant thiab catalyst.Nyob rau tib lub sijhawm, nws kuj tau txiav txim siab raws li qhov polarity ntawm cov khoom adsorbed.Nws muaj kev sib raug zoo rau dej, oxides, acetic acid, alkali, thiab lwm yam. Activated alumina yog ib hom micro-dej sib sib zog nqus desiccant thiab adsorbent rau adsorbing polar molecules.