What Is Sodium Nitrite (NaNO2)?

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Sodium nitrite is a commonly used ingredient in many industrial processes. due to its versatility, sodium nitrite is used in creating dyes/pigments, rubber/plastic, heat transfer salts, deodorizing products, etc. When sodium nitrite is food grade, it can also be used as a meat and fish preservative. These are only some of the benefits of using sodium nitrite as an ingredient. In this blog, we’ll cover its structure, properties, and most common applications.

If you’re looking for a sodium nitrite supplier for your business, call Kraft Chemical today at (708) 578-5844.

Sodium Nitrite’s Structure

Sodium nitrite has the chemical formula NaNO2. It’s an inorganic salt that’s yellowish-white in color and comes in the form of a crystalline granule, powder, or rod. Since it’s a synthetic compound, many industries produce sodium nitrite through the absorption of nitrogen oxides in a solution of sodium carbonate or sodium hydroxide.

Properties of Sodium Nitrite

  • Chemical formula: NaNO2 
  • Molar mass 68.9953 g/mol 
  • Appearance: white or slightly yellowish solid 
  • Density: 2.168 g/cm3 
  • Melting point: 271 °C (544 K, 520 °F) (decomposes at 320°C)
  • Solubility in water: 84.8 g/100 mL (25 °C) 
  • Acidity (pKa): ~9 
  • Refractive index (nD): 1.65

Sodium Nitrite Features

  • Very Soluble in Water 
  • Hygroscopic
  • White To Slight Yellowish in Color
  • Crystalline Powder Texture
  • Odorless 
  • Noncombustible
  • Inorganic Salt
  • Nontoxic 
  • Ecofriendly Compound

Major Industrial Applications of Sodium Nitrite

  •  Pesticides

Used in the industrial production of organonitrogen compounds commonly found in pesticides.

  • Dyes, Pigments, and Printing Ink

Utilized as a reagent for converting amines into diazo compounds.

  • Rubber and Plastic

Used to produce nitroso compounds, serving as a blowing agent in the rubber and plastic industries.

  • Molten Salt Baths

Can be combined with nitrite salts to create molten salt baths.

  • Leather & Textile

Acts as an acid neutralizer after chromium tanning in leather manufacturing.

  • Food Additive

Commonly used in the food industry to expedite the curing process of meats and fish.


nano2 use

  • Wastewater Treatment

Used to maintain proper pH levels, control sulfide odors, and reduce the demand for biological oxygen.

  • Deodorizing Products

Used to absorb unpleasant smells and is found in deodorizers for carpets, rooms, refrigerators, and garbage containers.


Sodium Nitrite as a Corrosion Inhibitor

Sodium nitrite serves as a potent anodic inhibitor, effectively interfering with the metal dissolution process and demonstrating corrosion-inhibiting properties. When sodium nitrite reacts with dissolved oxygen, it creates a protective gamma iron oxide film on metal surfaces. This film significantly reduces the rate of corrosion and prevents the degradation of metal structures. 

Since sodium nitrite exhibits non-corrosive characteristics towards steel, it’s popular in industrial greases, including chassis, gears, wheel bearings, ball bearings, conveyors, machine parts, and other moving components. These industries benefit from enhanced protection against corrosion, ensuring prolonged durability and optimal functioning of metal components in diverse mechanical systems with sodium nitrite.

Heat Treatments

Sodium Nitrite in Heat Treatments & Transfers

Sodium nitrite (NaNO2) plays a crucial role in various industrial processes, particularly in heat treatments and transfers. It serves as a heat transfer medium, facilitating the efficient movement of heat in different applications. Additionally, NaNO2 is utilized in the production of steel and aluminum alloys for processes such as phosphatizing and detinning. This versatile compound enhances the properties of these alloys, ensuring they meet specific performance and quality standards in the manufacturing of steel and aluminum products. Overall, sodium nitrite proves to be a valuable component in heat-related treatments and processes, contributing to the improvement of material properties in the production of metal alloys.


Get Industry-Grade Sodium Nitrite at Kraft Chemical

If you’re interested in ordering or learning more about sodium nitrite, call Kraft Chemical. We are committed to providing premier ingredients to all types of businesses, products, and industries. Our dedicated team is ready to assist you with comprehensive support and information tailored to your specific needs. For more details or to request a quote, feel free to reach out to the Kraft Chemical team. Trust us to be your reliable source for top-notch sodium nitrite solutions.

Call Us To Get Industry-Grade Sodium Nitrite Today

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