Mid-polarity phase: Crossbond 35% diphenyl / 65% dimethyl polysiloxane General-purpose columns for organochlorine pesticides, PCB congeners (e.g., Aroclor mixes), herbicides, pharmaceuticals, sterols, rosin acids, phthalate esters Equivalent to USP G42 phase Similar phases:Rtx-35, HP-35, DB-35, SPB-35, SPB-608, BPX-35, BPX-608, ZB-35, 007-35, AT-35, AT-35ms