NaCl
Compound · Salt
Sodium chloride
氯化钠 (食盐)
Sodium chloride (氯化钠 (食盐)), formula NaCl, is a salt with a molar mass of 58.44 g/mol (CAS 7647-14-5). White cubic crystals; readily soluble in water; solubility barely changes with temperature.
Key facts
| Molar mass | 58.44 g/mol |
|---|---|
| Category | Salt |
| State at 25°C | Solid |
| CAS | 7647-14-5 |
Structure
Na⁺ Cl⁻
Classic ionic crystal, face-centred cubic lattice
Physical properties
| Appearance | White cubic crystals |
|---|---|
| Melting point | 801 °C |
| Boiling point | 1413 °C |
| Density | 2.16 g/cm³ |
| Solubility | Readily soluble in water; solubility barely changes with temperature |
Key reactions
2NaCl + 2H₂O →(电解) 2NaOH + H₂↑ + Cl₂↑
Electrolysis of brine — the chlor-alkali process
NaCl + AgNO₃ → AgCl↓ + NaNO₃
Forms white AgCl — the chloride test
Main uses
- Food seasoning and curing
- Chlor-alkali feedstock for NaOH, Cl₂, soda ash
- Road de-icing and chemical raw material
Hazard
LowNon-toxic, though excess intake is unhealthy
Constituent elements
Data sources
Molar mass is computed from IUPAC (CIAAW) standard atomic weights; formula, properties and reactions can be verified on PubChem, NIST and Wikipedia. The CAS number is the substance's unique registry identifier. Educational reference only.