"Silica G" is a standard grade, unmodified Silica 60 with a surface area of 500 m2/g, mean pore size of 60A, specific pore volume of 0.75 ml/g, and particle size of 5-17um. The TLC plates contain UV254 fluorescent indicator. This analytical soft layer is bound to an aluminum support. It has a thickness of 200um and dimensions of 10x20cm. There are 20 plates per pack.