Choosing a seal material for Acetic Acid, 25% to 60%
The table above rates every common O-ring elastomer for service in Acetic Acid, 25% to 60% on an A–D scale. A is Excellent, B is Good, C is Fair (test before relying on it), and D is Not Recommended. An X indicates insufficient published data.
For Acetic Acid, 25% to 60%, the strongest candidates are Nitrile (Buna-N), Perfluoroelastomer, Ethylene Propylene, Silicone, Fluorosilicone, Butyl. These ratings are representative at ambient conditions (~20°C). Compatibility shifts with temperature, concentration, pressure and exposure time, so always validate the material against your real operating envelope before committing to a design.
