Ammonium sulfide is also commonly known as ammonium hydrogen sulfide and is primarily used in the production of fertilizers, fungicides and other agricultural chemicals. It is also used in some industrial processes as a pH adjuster and as an electroplating additive.
When exposed to rubber materials, ammonium sulfide can cause the rubber to become brittle, discolored, and suffer from reduced tensile strength due to the oxidation of the rubber material. Additionally, the sulfur content of the ammonium sulfide can react with the rubber material, causing it to swell and become soft and pliable. In the worst cases, the rubber can become so soft that it can no longer be used for its intended purpose.
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.
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