yqxpolymer.com-CSM Chemical Compatibility Chart_ Engineer’s Reference Guide.pdf

Explore YQXPOLYMER’s CSM (Hypalon®) chemical compatibility chart. Quickly check how chlorosulfonated polyethylene performs with acids, alkalis, solvents, and more.

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September 15, 2025
CSM Chemical Compatibility Chart: Engineer’s Reference
Guide
www.yqxpolymer.com/csm-chemical-compatibility-chart-engineers-reference-guide/
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

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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 °CGood Higher strength
acids may
degrade surface
Sulfuric Acid <30 % ≤80 °C Fair to Good Limit contact
time at elevated
temperatures
Acetic Acid Dilute ≤60 °C Good Avoid prolonged
contact with
glacial acetic
Sodium
Hydroxide /
Alkalis
Moderate ≤50 °C Conditional Rinse thoroughly
after exposure
Mineral /
Petroleum Oils
Light to
moderate
≤100 °C Fair to Poor Swelling
possible during
long-term
exposure
Alcohols
(ethanol,
methanol)
Moderate ≤60 °C Fair Short-term use
only
Ketones
(acetone, MEK)
Any Any Not
Recommended
Rapid
degradation
Aromatic
Hydrocarbons
Low <60 °C Poor Significant
swelling
Ozone / UV /
Weathering
— Wide Excellent One of CSM’s
strongest
advantages
*Rating Key: Excellent – minimal change; Good – minor effect; Fair – noticeable change,
short-term use; Poor – not recommended.
Engineering Guidelines
1. Always test under actual service conditions. Laboratory ratings provide guidance,
but field variables—pressure, stress, contamination—can change outcomes.

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2. Consider blends. For demanding chemical exposure, CSM can be co-vulcanized with
CR, EPDM, or NBR to optimize cost and performance.
3. Mind the temperature curve. Even a compatible chemical can become aggressive as
temperatures rise.
4. Plan for lifecycle costs. CSM’s long outdoor life and low maintenance often offset a
higher initial material cost.
See how CSM compares to other elastomers → CSM vs. EPDM vs. FKM
Why Choose YQXPOLYMER CSM
YQXPOLYMER offers high-purity CSM grades like YQX-CSM-30L that deliver:
Consistent viscosity and controlled particle size
Excellent dispersion for coatings, linings, and seals
Certified compliance with REACH, RoHS, and ISO 9001 standards
View all grades → YQXPOLYMER CSM Products
Applications That Benefit
Marine & Offshore – chemical-resistant liners, inflatable boats
Chemical Processing – tank linings, flexible joints
Infrastructure – roofing membranes, bridge expansion joints
Transportation – gaskets, protective coatings
Learn more → CSM in Marine & Offshore Applications
Contact Our Technical Team
Need detailed guidance or project-specific testing?
Email: [email protected]
Phone / WeChat: [phone]
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