Profile: Material Harvest Ltd. supplies chemical products for synthesis, purification, manufacture and desiccation. Our silica products include silica gel & Florisil® for column chromatography, reverse phase silica gel, silica-bound reagents & scavengers for organic synthesis & purification, and desiccant sachets. Florisil® is a hard powdered magnesia-silica gel often referred to as activated magnesium silicate or magnesia-silica gel. It is frequently employed in the areas of preparative and analytical chromatography. Material Harvest® reverse phase silica gel is also called octadecyl bonded silica gel.