• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I A. General Reagents

Silica Gel for Chromatography, Hexylsilyl, End-capped
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Silica Gel for Chromatography, Hexylsilyl, End-capped

A very finely divided (3-10 µm) silica gel, chemically modified at the surface by the bonding of hexylsilyl groups. To 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 tests where it is used.

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