PHOSPHORIC ACID Resistant O-Rings and Seals

Phosphoric acid, also known as orthophosphoric acid, is an inorganic compound with the chemical formula H3PO4. It is commonly used in many industries, such as food and beverage, pharmaceutical, agricultural and industrial production, and water treatment. It is also used as a cleaning agent for metal surfaces and to remove rust from steel.

When rubber is exposed to phosphoric acid, it can experience premature aging, cracking, and discoloration due to the acidity of the chemical. It is especially corrosive to elastomers, which are typically used in rubber seals. Over time, the acid can cause the rubber to lose its elasticity and become brittle, leading to failure. Additionally, rubber that is exposed to phosphoric acid for extended periods of time can become permanently stained.


FKM (Viton®)

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.

Common Names: FKM, FPM (Europe), Fluoropolymer, Fluoroelastomer


Here are just a few of the products we have available. Buy online or submit a quote for a fast response.
Recommended Material:
V1000 FKM
Low Temp
-15 °F (-30 °C)
High Temp
400°F (205 °C)
Base Material
FKM (Viton®)
Hardness
75
Color
Black
Attributes
  • General purpose material
Datasheet
Recommended Material:
V1003 FKM
Low Temp
-15 °F (-30 °C)
High Temp
400°F (205 °C)
Base Material
FKM (Viton®)
Hardness
75
Color
Brown
Attributes
  • General purpose material
Datasheet
Recommended Material:
V1007 FKM
Low Temp
-15 °F (-30 °C)
High Temp
400°F (205 °C)
Base Material
FKM (Viton®)
Hardness
90
Color
Black
Attributes
  • For higher pressure applications
Datasheet

Rubber Material Compatibility with PHOSPHORIC ACID

View some of our other material compatibility ratings with PHOSPHORIC ACID. 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
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