silica gel blue,white bead form,size 1--2mm,1--3mm,2--5mm supply ... , etc. Characteristcs:MF : mSiO2.nH2O CAS No.7631-86-9Color : white or blueSize : bead form or granular form, from 0.2 ... . It is trackless and virtually odorless, albeit expensive. Silica Gel white and Blue