5% Phenyl / 95% Dimethyl Polysiloxane. Low bleed. General purpose GC column for all routine analyses such as aromatics, pesticides, herbicides, hydrocarbons and essential oils. Suitable replacement for: DB-5, Rtx-5, HP-5, Ultra-2, PTE-5, SPB-5, MDN-5, CP-Sil 8CB, VB-5, ZB-5, VF-5ms.