About Hypersil BDS C18 HPLC Columns For a robust, all-purpose column for a wide range of applications, choose Thermo Scientific Hypersil BDS C18 HPLC columns. These economical columns have lower silanol activity and offer exceptional reliability for quality assurance/quality control laboratories. Based on the well-known Hypersil silica, the base-activated silica is one of the most popular packing materials available.