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Thermochemistry

Sodium nitrate

Properties

General

Name Sodium nitrate
Chemical formula NaNO3
Appearance White powder or colorless crystals

Physical

Formula weight 85.0 amu
Melting point 580 K (307 °C)
Boiling point decomposes at 653 K (380 °C)
Density 2.3 ×103 kg/m3
Crystal structure ?
Solubility 92 g in 100mL water

Thermochemistry

ΔfH0liquid -452 kJ/mol
ΔfH0solid -468 kJ/mol
S0solid 117 J/mol·K

Safety

Ingestion Very dangerous, possibly fatal.
Inhalation Similar to ingestion.
Skin May cause irritation.
Eyes May cause irritation.
More info Hazardous Chemical Database

SI units were used where possible. Unless otherwise stated, standard conditions were used.

Disclaimer and references


Sodium nitrate is a type of salt which has long been used as an ingredient in explosives, and has been mined extensively for that purpose. The world's largest deposits were in the Atacama desert of Chile, and these were mined for over a century, until the 1940s.

It has antimicrobial properties when used as a food preservative.

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01-04-2007 01:16:19
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