Silica Gel for Chromatography, Octadecylsilyl, End-capped, Base-deactivated

A very finely divided (3 μm-10 μm) silica gel with a pore size of 10 nm and a carbon loading of 16%, pre-treated before the bonding of octadecylsilyl groups by washing and hydrolysing most of the superficial siloxane bridges. To further minimise any interaction with basic compounds it is carefully end-capped to cover most of the remaining silanol groups. The particle size is indicated after the name of the reagent in the test where it is used.

Fine, white or almost white, homogeneous powder, practically insoluble in water and in ethanol (96%).