Potassium nitrite

Potassium nitrite is an inorganic salt with the chemical formula KNO2 and CAS number 7758-09-0. This compound has a molecular weight of 85.104 g/mol and appears as white or slightly yellowish crystalline powder. It serves as an important industrial chemical with oxidizing properties, classified as a hazardous substance requiring careful handling due to its acute toxicity and environmental impact on aquatic systems.

Potassium nitrite is a white to pale yellow crystalline solid that is highly soluble in water and slightly soluble in ethanol. The compound is hygroscopic, meaning it absorbs moisture from air, and decomposes at elevated temperatures above 440°C. It exhibits strong oxidizing properties and can react vigorously with reducing agents, organic materials, and combustible substances, making it chemically reactive under certain conditions.

Potassium nitrite is primarily used as a food preservative in meat processing to prevent bacterial growth and maintain color. Industrial applications include its use as a corrosion inhibitor in metalworking fluids, an intermediate in dye and pharmaceutical manufacturing, and as an analytical reagent in laboratories. It also serves in heat treatment salt baths and as a component in some photographic processes.

Potassium nitrite requires careful handling due to its acute toxicity and oxidizing properties. Personal protective equipment must include nitrile gloves, safety goggles, and dust masks to prevent inhalation or skin contact. Work in well-ventilated areas away from heat sources, combustible materials, and reducing agents. Avoid creating dust clouds and ensure emergency eyewash stations and safety showers are readily accessible.

Potassium nitrite must be stored in tightly sealed containers in cool, dry, well-ventilated areas away from heat sources and direct sunlight. Keep separated from incompatible materials including acids, reducing agents, organic compounds, and combustible materials. Storage areas should be equipped with appropriate fire suppression systems and maintained at stable temperatures to prevent decomposition and moisture absorption.

In case of skin contact with potassium nitrite, immediately remove contaminated clothing and rinse affected areas with plenty of water for at least 15 minutes. For eye contact, flush immediately with water for 15-20 minutes. If inhaled, move to fresh air immediately. If ingested, rinse mouth and seek immediate medical attention. Never induce vomiting and always consult emergency medical services for any exposure.

Potassium nitrite disposal must comply with local environmental regulations as hazardous waste due to its acute aquatic toxicity classification. The substance cannot be disposed of in regular waste streams or sewage systems. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Small quantities may require neutralization under professional supervision before disposal according to regional hazardous waste management protocols.

Potassium nitrite is classified as ADR Class 5.1 (oxidizing substances) Packing Group II, requiring specialized dangerous goods transport procedures. Packages must bear appropriate hazard labels including GHS03, GHS06, and GHS09 pictograms with 'Danger' signal word. Transport vehicles need proper ventilation, emergency equipment, and trained drivers with ADR certification. Documentation must include safety data sheets and transport emergency cards.

Potassium nitrite is regulated under multiple European frameworks including REACH registration requirements and CLP classification as Oxidizing Solid Category 2, Acute Toxicity Category 3, and Aquatic Acute Category 1. It requires safety data sheets for professional users and is subject to food additive regulations when used in food processing. The substance is not currently listed as SVHC under REACH.

Potassium nitrite is available through OYSI, a specialized European distributor of technical chemicals serving industrial and professional customers. OYSI provides reliable supply chains across Europe with proper documentation, safety data sheets, and regulatory compliance support. Professional buyers can contact OYSI directly for quotations, technical specifications, and delivery arrangements to meet their specific industrial requirements.