CommaSil® Phenyl HPLC Column is based on ultrapure, fully porous spherical silica with surface-bonded phenylpropyl groups and are fully endcapped. Different selectivity than straight alkane chains, strong retention ability for aromatic compounds. It is widely used in the separation of drug molecules containing aromatic and heterocyclic groups and tea polyphenols and can replace phenylpropyl bonded silica columns on the market.