Potassium nitrite (KNO2) is a white to slightly yellow, crystalline solid used in various industrial applications, including as a corrosion inhibitor, in the manufacture of dyes, and as a reagent in chemical synthesis. It is also used in the food industry as a preservative and color fixative for meats and fish. Potassium nitrite is highly toxic and can cause skin and eye irritation upon contact. Proper handling requires the use of protective equipment such as gloves and goggles. Storage should be in a cool, dry place, away from incompatible substances like strong acids. Disposal must follow local regulations to prevent environmental contamination. Potassium nitrite is valued for its effectiveness as a preservative and corrosion inhibitor, but its use requires strict adherence to safety protocols to prevent health and environmental hazards.

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