Introduction
When engineers and designers specify chlorosulfonated polyethylene (CSM)—often known by the DuPont trade name Hypalon®—they need fast access to chemical resistance data. CSM is renowned for exceptional weathering, ozone, and UV stability, but compatibility with chemicals varies by concentration and temperature.
This guide provides a concise, engineer-friendly chemical compatibility chart to help you make informed material decisions.

Quick Reference: Chemical Compatibility Ratings
Chemical / Family Typical Concentration Temperature Range Rating* Notes
Water (distilled) Any ≤100 °C Excellent Minimal swelling, long service life
Hydrochloric Acid ≤20 % up to 80 °C Good Higher strength acids may degrade surface
Sulfuric Acid