Home › Chemicals › Sodium Nitrate CAS 7631-99-4: Sodium Nitrate (NaNO3) Identity CAS Number 7631-99-4 Molecular Formula NaNO3 IUPAC Name sodium nitrate Molecular Weight 85.0 g/mol SMILES [Na+].[O-]N(=O)=OSynonyms Chile saltpeter, niter, soda niter, NaNO3
2D Structure
Physical Properties Density 2.257 g/mL at 25°C Boiling Point 380.0°C Melting Point 307.0°C Flash Point None°C Vapor Pressure 0.0 kPa at 20°C Refractive Index nD = 1.587 Dielectric Constant ε = 5.5
Safety & GHS Classification GHS03 Irritant
H272: May intensify fire; oxidizer H319: Causes serious eye irritation Storage: Store in cool, dry place away from combustible materials. Strong oxidizer — do not mix with organic materials. Keep away from reducing agents and acids.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Good PE Good PP Good PEEK Good PVDF Good
Rubbers Material Rating Viton Good NBR Fair EPDM Good Silicone Good FKM Good
Metals Material Rating Stainless 316 Good Aluminum Poor Copper Poor Brass Poor
Applications Fertilizer (nitrogen source) Glass manufacturing (fluxing agent) Food preservative (E251 — cured meats) Explosives manufacturing (minor) Solar thermal energy storage (molten salt) Wastewater treatment (corrosion inhibitor) Heat treatment salt baths Pyrotechnics External References: PubChem
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