Sodium Nitrite Product Introduction
Sodium nitrite (NaNO₂) is an inorganic compound, an inorganic salt formed by the combination of nitrite ions and sodium ions. It has the chemical formula NaNO₂ and appears as a white crystalline powder. It is hygroscopic, highly soluble in water and liquid ammonia, with an aqueous solution that is alkaline (pH ≈ 9), and slightly soluble in organic solvents such as ethanol, methanol, and ether.
1. Main Uses
Sodium nitrite has a wide range of applications. As a food additive, it exhibits antibacterial, coloring, antioxidant, and flavor-enhancing effects and is widely used in the preservation of meat products. In addition to being a food preservative, it is also an excellent coloring agent and flavor enhancer for meat products, especially widely used in the cured meat industry. Sodium nitrite can also be used as a corrosion inhibitor in the steel manufacturing industry and a setting agent in the construction industry. Furthermore, it is an anodic corrosion inhibitor, widely applied in the machinery industry. Sodium nitrite reacts with metals on their surfaces to form a dense oxide film, which acts as a protective layer preventing the ionization of inner-layer metals and inhibiting electrochemical anodic reactions, thereby slowing down the electrochemical corrosion of metals. Hence, it is widely used in the machinery industry to prevent corrosion of various metals. Additionally, sodium nitrite is used as a mordant, bleaching agent for fabrics, rubber additive, metal heat treatment agent, concrete antifreeze agent, and for preparing other nitrites, making it a versatile basic inorganic chemical intermediate.
2. Storage Precautions
Operate in a closed system with enhanced ventilation. Operators must receive specialized training and strictly follow operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical safety goggles, rubberized toxic-proof clothing, and rubber gloves. Keep away from ignition sources and heat, and smoking is strictly prohibited in the workplace. Avoid generating dust. Prevent contact with reducing agents, active metal powders, and acids. Handle with care during transportation to avoid damage to packaging and containers. Equip with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment. Empty containers may retain harmful residues.
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