POTASSIUM SULFITE Resistant O-Rings and Seals

Potassium sulfite, also known as dipotassium sulfite or sulfurous acid potassium salt, is a common industrial chemical used in the agricultural, pharmaceutical, and food production industries. It is most often used as a preservative for food, a de-chlorinating agent for water, and a reducing agent for certain pharmaceuticals.

When rubber is exposed to potassium sulfite, it can be degraded by the chemical. Common types of failures include cracking, swelling, and discoloration of the rubber. Over time, the rubber can become brittle and can break apart easily. The chemical can also cause the rubber to break down more quickly than normal, leading to a shorter lifespan. It can also cause the rubber to become sticky or to become brittle and crack prematurely.