Silica Gel, Premium Rf has a porosity of 60A, particle distribution of 40-75um, and a quantity of 500g. It is used as the stationary phase for traditional Flash Chromatography Columns. Premium Rf (Resolution Factor) silica gel is the highest quality granular silica gel on the market. This high-purity product provides narrow particle and pore distribution and is designed to increase yield, making it ideal for complicated separations both in the lab and in full-scale production.