Silica Gel for Chromatography, Butylsilyl

A very finely divided silica gel (3 μm-10 μm), chemically modified at the surface by the bonding of butylsilyl groups. The particle size is indicated after the name of the reagent in the tests where it is used.

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

Spheroidal silica, 30 nm; pore volume, 0.6 cm³g^–1; specific surface area, 80 m²g^–1.