General purpose fused silica column for solvent impurities, sulfur compounds, essential oils, hydrocarbons, semivolatiles, pesticides, and more. Nonpolar, crossbond dimethyl polysiloxane phase equivalent to USP G1, G2, G38. Long lasting, with low bleed at high operating temperatures. Includes 5m integrated guard column. Temperature range -60C to 330/350C. Similar phases: Phenomenex: ZB-1, Agilent CP-Sil 5 CB, DB-1, HP-1, Restek Rtx-1.