Sodium nitrite (chemical formula: NaNO₂) is an inorganic compound. It appears as white crystalline powder at room temperature, is highly soluble in water, and exhibits both oxidizing and reducing properties. It can react with amine compounds under specific conditions. As a vital industrial raw material, sodium nitrite has a wide range of applications. In the food processing industry, it is a legally permitted food additive (subject to strict compliance with national limits). It is mainly used in cured and marinated meat products to preserve color, enhance flavor, and inhibit harmful microorganisms (e.g., Clostridium botulinum). In the industrial sector, it serves as a metal heat treatment agent, rust inhibitor, and concrete accelerator to improve material performance. In the pharmaceutical field, it is also used in the synthesis of specific drugs to support medical R&D and production. It is important to note that sodium nitrite is toxic in excessive amounts, and overexposure can pose health risks. Therefore, its production, sales, use, and transportation must strictly adhere to the regulatory standards of the country of origin and the target market. As a compliant sodium nitrite manufacturer and exporter, our products fully meet China’s GB standards as well as major international standards (e.g., EU, US standards). We provide a complete set of qualification documents to ensure our customers use the product safely and legally for intended purposes.
Parameters
Parameter Type | Item | Specification |
Basic Chemical Info | Chemical Formula | NaNO₂ |
CAS Number | 7632-00-0 | |
UN Hazard Class/Number | Class 5.1 (Oxidizer); UN 1500 | |
Key Physical Indices | Appearance | White/pale yellow crystalline powder (no visible impurities) |
Melting Point | 271°C (decomposes >320°C) | |
Purity (NaNO₂ Content) | ≥99.0% (food-grade); ≥98.5% (industrial-grade) | |
Safety & Compliance | Shelf Life | 24 months (sealed original packaging) |
Main Standards | Food-grade: GB 1886.11-2016, EU 1333/2008, US FDA 21 CFR §172.175Industrial-grade: GB/T 2367-2016, ASTM D1585-16 |
Application
1. Metal Processing & Manufacturing: Apply NaNO₂ in metal heat treatment (quenching/tempering agent) to adjust hardness/toughness and extend workpiece life; also use as a rust inhibitor for short-term protection of steel products.
2. Building Materials Manufacturers: Add NaNO₂ to concrete as an accelerator to speed up setting/hardening, shorten curing time, and improve frost resistance for low-temperature construction.
3. Pharmaceutical & Chemical R&D Enterprises: Use NaNO₂ as a raw material for synthesizing pharmaceutical intermediates (sulfonamides, vasodilators); act as oxidant/reductant in dye/pigment production.
4. Water Treatment & Environmental Enterprises: Employ NaNO₂ as a corrosion inhibitor in industrial cooling water systems; use its reducibility to remove oxidative pollutants in specific wastewater treatment (based on water composition).