HYDROGEN CYANIDE Resistant O-Rings and Seals

Hydrogen cyanide (also known as hydrocyanic acid, prussic acid, or HCN) is a highly toxic and volatile substance that is used in a variety of industries, including the production of synthetic fibers, plastics, dyes, and other chemical compounds. It is also used in pesticide formulations and in the production of nitriles.

Common types of failures when rubber is exposed to hydrogen cyanide gas include discoloration, cracking, and embrittlement due to the corrosive nature of the gas. Additionally, rubber seals exposed to hydrogen cyanide gas may become brittle and prone to cracking or tearing over time, as the acid slowly breaks down the rubber material. Additionally, exposure to hydrogen cyanide gas may cause the rubber seal to swell or become distorted due to its ammonia-like properties.


Buna-N (NBR, Nitrile, Buna)

Buna-N o-rings also referred to as NBR o-rings and Nitrile o-rings are the most widely used o-ring material in the word because of low cost, good mechanical performance with resistance to water, most basic oils, lubricants and some fuels, many pneumatic, hydraulic systems, and the default choice for basic applications. Buna-N o-rings are not recommended for exposure to sunlight, UV light, ozone and general outdoor weathering or hash chemicals, acids, keytones and many others.

Common Names: Buna-N, Nitrile, NBR, Acrylonitrile Butadiene Rubber


Here are just a few of the products we have available. Buy online or submit a quote for a fast response.
Recommended Material:
B1000 Buna-N
Low Temp
-30 °F (-35 °C)
High Temp
250°F (125 °C)
Base Material
Buna-N (NBR, Nitrile, Buna)
Hardness
70
Color
Black
Attributes
  • General purpose material
Datasheet
Recommended Material:
B1001 Buna-N
Low Temp
-30 °F (-35 °C)
High Temp
250°F (125 °C)
Base Material
Buna-N (NBR, Nitrile, Buna)
Hardness
90
Color
Black
Attributes
  • For higher pressure applications
Datasheet
Recommended Material:
M1004 Buna-N
Low Temp
-65 °F (-55 °C)
High Temp
275°F (135 °C)
Base Material
Buna-N (NBR, Nitrile, Buna)
Hardness
90
Color
Black
Attributes
  • Listed on the Qualified Products List (QPL)
  • For higher pressure applications
Datasheet

Rubber Material Compatibility with HYDROGEN CYANIDE

View some of our other material compatibility ratings with HYDROGEN CYANIDE. 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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