Other Names:
Chile Saltpeter, Peru Saltpeter, Soda Niter, Cubic Niter, Nitratin, Sodium Nitrate E251
Specification Summary
- Purity: ≥99.0% (Technical/Food Grade)
- Form: White crystalline powder or granules
- CAS No.: 7631-99-4
- Molecular Formula: NaNO₃
- Molecular Weight: 84.99 g/mol
Product Description
Sodium Nitrate is a white, odorless, crystalline solid that is highly soluble in water and slightly hygroscopic. It is stable under neutral or alkaline conditions and has a neutral to slightly alkaline nature. Sodium nitrate is non-corrosive under normal conditions but may accelerate corrosion of certain metals in moist environments. Its high solubility and inertness make it a versatile compound for various industrial, agricultural, and food applications.
Sodium Nitrate Specification Table
| Property | Specification / Value |
| Chemical Name | Sodium Nitrate |
| Other Names | Chile Saltpeter, Soda Niter |
| CAS Number | 7631-99-4 |
| Molecular Formula | NaNO₃ |
| Molecular Weight | 84.99 g/mol |
| Appearance | White crystalline powder/granules |
| Purity (NaNO₃) | ≥99.0% |
| Density (20°C) | 2.26 g/cm³ |
| Melting Point | 307–308°C |
| Boiling Point | 380°C |
| Solubility in Water (20°C) | 88–91.2 g/100 mL |
| pH (1% Solution) | Neutral to slightly alkaline |
| Loss on Drying | ≤0.5% |
| Insolubles | ≤0.04% |
Downloadable TDS
A comprehensive Technical Data Sheet (TDS) is available, providing detailed chemical, physical, and safety specifications, as well as handling, storage, and regulatory compliance information.
Application Sectors and Industries of Sodium Nitrate
Fertilizer Industry
Sodium nitrate is a vital nitrogen source in fertilizers, supplying plants with readily available, water-soluble nitrogen. It promotes rapid growth and is especially valued in greenhouse, horticultural, and specialty crop production.
Food Processing
Used as a preservative and color fixative in cured meats and poultry, sodium nitrate (E251) helps inhibit bacterial growth and maintains the characteristic pink color of processed meats. It is approved for use in the EU, US, and many other regions.
Explosives Manufacturing
A key oxidizing agent in the production of explosives such as dynamite and propellants. Its high oxygen content supports rapid combustion in pyrotechnics, mining, and military applications.
Glass and Ceramics
Sodium nitrate acts as a flux in glass and ceramic manufacturing, lowering melting points and improving clarity. It is also used in the production of specialty glass and enamels.
Metal Treatment and Surface Coating
Employed in steel and metal industries for heat treatment, annealing, and the formation of protective magnetite layers on steel surfaces. It enhances corrosion resistance and surface finish.
Water Treatment
Used as a corrosion inhibitor in water systems and as a nutrient in biological wastewater treatment to promote denitrification and control odors.
Pharmaceuticals
Sodium nitrate is used as a raw material and intermediate in the synthesis of active pharmaceutical ingredients and certain medicinal formulations.
Chemical Manufacturing
A precursor in the production of sodium nitrite, nitric acid, and other specialty chemicals. It is also used as a reagent in laboratory and industrial processes.
Thermal Energy Storage
Due to its high thermal stability and melting enthalpy, sodium nitrate is used in molten salt mixtures for solar thermal power plants and heat transfer applications.
Agriculture and Livestock
Apart from fertilizers, sodium nitrate is included in livestock feed as a nitrogen supplement, promoting healthy animal growth and development.
Packaging Types
- 25 kg Polyethylene or Paper Bags:
Moisture-resistant, sealed bags suitable for manual handling and small-scale industrial, agricultural, or food applications. - 50 kg Multi-Wall Paper Bags:
Heavy-duty, lined bags for bulk users in fertilizer, chemical, or glass industries. - 1,000 kg Jumbo Bags (FIBCs):
Flexible Intermediate Bulk Containers for efficient storage and transport in large-scale manufacturing or agricultural operations. - Bulk Tankers:
Used for direct delivery to major industrial customers, ensuring product integrity and minimizing contamination. - Food-Grade Packaging:
25 kg poly-lined bags with tamper-evident seals, compliant with food safety standards for E251 applications.
For detailed product specifications, safety data, and regulatory compliance, please download the Technical Data Sheet (TDS) or contact our technical support team.
