Sodium nitrite

Sodium nitrite is an inorganic compound with the chemical formula NNaO2 and CAS number 7632-00-0. It has a molecular weight of 68.995 g/mol and appears as white to slightly yellowish crystalline powder. This chemical substance is classified as an oxidizing solid with acute toxicity properties and aquatic hazard potential. It is widely used in various industrial applications and requires careful handling due to its hazardous nature.

Sodium nitrite is a white to pale yellow crystalline solid that is highly soluble in water. It has no characteristic odor and readily dissolves in polar solvents. The compound is hygroscopic, meaning it absorbs moisture from the air. It has a relatively low molecular weight of 68.995 g/mol and decomposes at elevated temperatures, releasing toxic nitrogen oxides. Its high water solubility makes it easily dispersible in aqueous solutions.

Sodium nitrite serves multiple industrial purposes, primarily as a food preservative in meat processing where it prevents bacterial growth and maintains color. It is used in metal treatment for corrosion inhibition, particularly in cooling systems and boilers. The compound also finds applications in pharmaceutical synthesis, dye manufacturing, and as an analytical reagent in laboratory settings. Additionally, it serves as an intermediate in various chemical synthesis processes.

Sodium nitrite requires careful handling with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work in well-ventilated areas to avoid inhalation of dust particles. Avoid contact with skin, eyes, and clothing as it can cause irritation. Keep away from incompatible materials like acids and reducing agents. Always wash hands thoroughly after handling and never eat, drink, or smoke while working with this substance.

Sodium nitrite should be stored in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers tightly closed to prevent moisture absorption and contamination. Store separately from acids, reducing agents, and combustible materials due to its oxidizing properties. Maintain storage temperature below 25°C and ensure adequate ventilation. Use original containers or chemically compatible alternatives, and implement proper labeling and inventory management systems.

In case of skin contact with sodium nitrite, immediately remove contaminated clothing and rinse affected area with plenty of water for at least 15 minutes. For eye contact, flush eyes with clean water for 15 minutes while holding eyelids open. If inhaled, move to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician if symptoms persist or if significant exposure occurs.

Sodium nitrite disposal must comply with local and national environmental regulations as it poses aquatic hazards. Contact licensed waste disposal companies for proper handling and treatment. Small quantities may be neutralized under controlled conditions by qualified personnel, but never dispose of it down drains or in regular waste. Collect waste in appropriate containers, label clearly, and maintain disposal records. Consider recycling options through specialized chemical waste management services when available.

Sodium nitrite is classified under ADR transport regulations as Class 5.1 (Oxidizing Substances), Packing Group III. It requires appropriate UN packaging and labeling with oxidizing and toxic hazard symbols. Vehicles must carry proper documentation including transport documents and emergency response information. Drivers need ADR training certification. Packages must be secured to prevent damage during transport and separated from incompatible materials according to segregation requirements.

Sodium nitrite is subject to various European regulations including REACH registration requirements and CLP classification standards. It is classified as Ox. Sol. 3, Acute Tox. 3, and Aquatic Acute 1 under CLP regulation, requiring specific labeling with GHS03, GHS06, and GHS09 pictograms. Food industry applications are regulated under specific food additive legislation. It is not currently listed as a SVHC substance under REACH regulation.

Sodium nitrite is available through OYSI, a trusted European distributor of technical chemicals. OYSI provides high-quality sodium nitrite suitable for various industrial applications across Europe. As a specialized chemical distributor, OYSI ensures proper handling, documentation, and regulatory compliance for all shipments. Contact OYSI directly for specific grades, quantities, and delivery options tailored to your technical requirements and geographical location within the European market.