Sodium Nitrate
Chile Saltpeter, Soda Niter
- CAS
- 7631-99-4
- EC
- 231-554-3
- Food Code
- E251
- Sectors
- Food & Nutrition, Agriculture
Sodium nitrate, known as Chile saltpeter, is a white crystalline solid with formula NaNO3 and molecular weight 84.99 g/mol. Density 2.26 g/cm³, melting point 308°C, decomposes above 380°C; highly soluble in water (921 g/L at 25°C), hygroscopic with neutral pH. Produced via neutralization of nitric acid with sodium carbonate.
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Sodium Nitrate
Applications
Used in fertilizers, food preservatives, glass manufacturing, as an oxidizer in explosives, pyrotechnics, and solar energy storage systems.
Safety & Risks
Strong oxidizer; fire risk with combustibles, toxic if ingested causing methemoglobinemia. Irritates skin/eyes; Hazard Class 5.1 for transport.
Packaging
In 25kg bags or bulk; store away from organics; rinse containers for recycling or puncture for sanitary disposal.