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NITRIC ACID, RED FUMING Chemical compatibility with O-rings, rubbers, & plastics

Red fuming nitric acid, commonly abbreviated as RFNA, is a highly concentrated form of nitric acid containing dissolved nitrogen dioxide, which gives the liquid its distinctive red color and strong oxidizing properties. It is primarily used as an oxidizer in rocket propulsion systems and in specialized industrial processes requiring powerful oxidizing conditions. In equipment handling RFNA, compatibility with O-rings, rubber seals, gaskets, and plastic components must be carefully evaluated to prevent rapid degradation. Because RFNA is extremely corrosive and reactive, strict storage controls, specialized handling procedures, ventilation, and appropriate PPE are essential for safe operation.

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