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POTASSIUM SULFITE Chemical compatibility with O-rings, rubbers, & plastics

Potassium Sulfite (K2SO3) is an inorganic compound that appears as a white crystalline powder or granules. It is highly soluble in water, forming a solution with a slightly sulfurous odor. This compound is widely used as a preservative and antioxidant in the food and beverage industry, particularly in winemaking and the preservation of dried fruits and vegetables. Potassium Sulfite helps to prevent the growth of unwanted microorganisms and oxidation of products, thereby extending their shelf life. In the chemical industry, it serves as a reducing agent and in the preparation of other sulfur-containing compounds. Additionally, it finds applications in the photographic industry as a component of developers and fixers. In environmental chemistry, Potassium Sulfite is used in air and water treatment processes to remove excess chlorine and other contaminants.

Need POTASSIUM SULFITE resistant plastics, O-rings, rubbers, and seals? Get in touch now!


Canyon Components strives to meet all customer service requests. If you need something that isn't listed below, feel free to contact a Canyon Components product and application consultant and let our knowledgeable staff help you design the perfect part for your needs.

Paint covered o-ring
MaterialPerformanceGet a quote
FFKM (CanRez™, Kalrez®, Chemraz®)Excellent: <15% SwellingGet a quote
FKM ETP (Viton® Extreme)Excellent: <15% SwellingGet a quote
FKM (Viton®)Excellent: <15% SwellingGet a quote
NBR (Buna-N, Nitrile)Excellent: <15% SwellingGet a quote
HNBR (Hydrogenated Nitrile)Excellent: <15% SwellingGet a quote
EPDM (Ethylene Propylene)Excellent: <15% SwellingGet a quote
Aflas® (TFE/P, FEPM)--- Insufficient Testing DataGet a quote
Silicone (VMQ, PVMQ)Excellent: <15% SwellingGet a quote
Fluorosilicone (FVMQ)Excellent: <15% SwellingGet a quote
Polyurethane (PU, AU)Excellent: <15% SwellingGet a quote
Teflon® (PTFE)--- Insufficient Testing DataGet a quote
Neoprene (Chloroprene)Excellent: <15% SwellingGet a quote
SBR (Styrene-Butadiene)Acceptable: <15-25% SwellingGet a quote
ACM (Acrylic Rubber)Not Recommended: Over 40% SwellingGet a quote
Butyl (IIR, Isobutylene Isoprene)Excellent: <15% SwellingGet a quote
Butadiene Rubber (BR)Excellent: <15% SwellingGet a quote
Isoprene Rubber (Polyisoprene)Acceptable: <15-25% SwellingGet a quote
Natural Rubber (NR)Acceptable: <15-25% SwellingGet a quote
Hypalon (CSPE)Acceptable: <15-25% SwellingGet a quote
Metal Piston

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