Sulfur trioxide, also known as sulfuric anhydride, is a colorless, odorless and highly corrosive compound. It is widely used in the production of fertilizers, dyes, and explosives. In addition, it is used in the production of sulfuric acid, which is a key ingredient in many industrial processes, including petroleum refining and metal processing.
When rubber is exposed to sulfur trioxide, it can cause severe swelling and cracking, leading to material failure. This is because sulfur trioxide attacks the rubber's molecular structure, breaking apart the polymers and leading to the formation of small cracks. In addition, the chemical can also cause the rubber to discolor, and can lead to a decrease in the material's strength and flexibility. Furthermore, sulfur trioxide can also lead to an increase in the rubber's permeability, allowing for the passage of water and other chemicals, which can further damage the rubber.
Viton ® o-rings from Marco Rubber offer excellent compatibility with a range of chemicals, oils and resist high temperatures up to 400F. Viton ® is also known as FKM made of fluoroelastomer one of the most versatile and widely used sealing materials.
View some of our other material compatibility ratings with SULFUR TRIOXIDE. If you don't see what you're looking for or need more guidance, our team of experienced sealing design engineers can help select the best sealing products and material for your specific application.View Full Chemical Compatibility Guide