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SiliCycle SiliaBond Functionalized Silica Gel Propylsulfonic Acid (SCX-2), 40 to 63 um, 60 A, Qty: 100 g, Particle Size: 40 to 63 um, Technique: Column Chromatography, Bulk Functionalized Irregular Silica Gel, Content And Storage: Keep Dry, Density: 0.728