Column Chromatography Silica gel 1.ISO9001, MSDS, SGS, REACH 2.500g/bottle, ... industrial and reagent type Coating Auxiliary AgentsWhite Silica Gel catalyst (silica gel,silica gel desiccant,adsorbent)Bead :1-2mm,1-3mm, ... ,4-6mm,4-8mmUSE: Mainly used for drying and moisture proof ,may also be used as catalyst carriers, adsorbents ... as your specific requirement. SANPONT Colunm Chromatography Silica Gel 60