Sodium nitrite is a preservative and colour-fixing agent used in meats, meat products and fish. It also functions as a corrosion inhibitor in closed-loop industrial cooling systems. Other uses include textile dyeing and printing as a colour fixative and use as a chemical intermediate. It takes the form of white to slight yellowish crystalline powder or granules. Packaging options include 25 kg bag and 1000 kg big bag. Food use as E 250 is subject to the applicable food-additive specification and permitted-use conditions.