Non-polar phase: Crossbond 100% dimethyl polysiloxane General-purpose columns for solvent impurities, PCB congeners (e.g., Aroclor mixes), simulated distillation, arson accelerants, gases, natural gas odorants, sulfur compounds, essential oils, hydrocarbons, semi-volatiles, pesticides, oxygenates. Equivalent to USP G1, G2, G38 phases. Similar phases: Rtx-1, HP-1, DB-1, CP Sil 5 CB, SPB-1, BP-1, ZB-1, AT-1, EC-1