Sodium Nitrite

Corrosion inhibitor in antifreeze, boiler water, cleaners, concrete, cooling water, oil storage tanks, rubber accelerators, diazotization (by reaction with hydrochloric acid to form nitrous acid), color fixative and preservative in cured meats, meat products, fish; pharmaceuticals, photographic and analytical reagent, dye manufacture, antidote for cyanide poisoning. Heat transfer salts, metal coatings, blowing compounds, textile dying, organic synthesis and production of azo dyes.