Low-polarity phase: Crossbond 5% diphenyl / 95% dimethyl polysiloxane Tested and guaranteed for ultra-low bleed; improved signal-to-noise ratio for better sensitivity and mass spectral integrity. General-purpose columns for semi-volatiles, phenols, amines, residual solvents, drugs of abuse, pesticides, PCB congeners (e.g., Aroclor mixes), solvent impurities. Equivalent to USP G27 and G36 phases. Similar phases: Rxi-5MS, HP-5ms UI, HP-5ms, DB-5, Ultra-2, CP Sil 8 CB, SPB-5, Equity-5 BP-5, ZB-5, ZB-5ms, AT-5ms