Non-polar phase: Crossbond™ 100% dimethyl polysiloxane General-purpose columns for solvent impurities, PCB congeners (e.g., Aroclor mixes), gases, natural gas odorants, sulfur compounds, essential oils, hydrocarbons, semivolatiles, pesticides, and oxygenates. Equivalent to USP G1, G2, G38 phases. 4.5" standard coil diameter. Similar phases: DB-PS1, UAC-1