Sodium nitrate
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| Chemical formula | NaNO3 |
|---|---|
| OTP appearance | white crystals |
| Molar Mass(g/mol) | 85 |
| Melting Point(°C) | 308 |
| Density(g/cc) | 2.257 |
| NFPA 704 |  0
1
0
OX
|
| Thermal Decomposition | sodium nitrate
380°C NaNO2,O2 |
Uses
Justification Questioned
Other
- Feedstock for nitric acid
- Source of nitrate ions (cf. paracetamol)
- Pharm: IV treatment for cyanide and hydrogen sulfide poisoning.
Natural occurrence
- Sodium nitrate occurrs naturally as chilean saltpeter
Hazards
- LD50 is 3.6g/kg (inhaled)
Production
Synthesis
- Neutralize nitric acid with sodium salt (sodium hydroxide, sodium bicarbonate)
- HNO3 + NaOH → NaNO3 + H2O
- HNO3 + NaHCO3 → CO2 + H2O + NaNO3
- Metathesis: Combine sodium carbonate with calcium nitrate, silver nitrate, lead nitrate...
- Na2CO3(aq) + Ca(NO3)2(aq) → 2 NaNO3(aq) + CaCO3(s)