silica gel blue,white bead form,size 1--2mm,1--3mm, ... Characteristcs: MF : mSiO2.nH2O CAS No.7631-86-9Color : white or blueSize : bead form or granular form, from 0. ... , it takes to adsorb the various substance, it can achieve the separation and purification from the mixed components, used for ... C18 groups) are attached to the silica gel then polar components elute first and the method is referred to as ...