NaOHNaOH39.9970 g·mol⁻¹
Molar mass39.997 g·mol⁻¹calc 39.997 • Atomic weights: CIAAW 2021 (conventional atomic weights)
FormulaNaOHNaOH
Classbase • ionicsolid
| Element | Count | Mass (g/mol) | Mass % |
|---|---|---|---|
| Na | 1 | 22.990 | 57.48% |
| O | 1 | 15.999 | 40.00% |
| H | 1 | 1.008 | 2.52% |
Physical properties
- State at STP
- solid
- Density
- 2.13 g·cm⁻³ (solid at 20 °C, 1 atm)
- Melting point
- 591 K (1 atm)
- Boiling point
- 1661 K (1 atm)
Structure & bonding
Ionic lattice Na+ OH- in solid; fully dissociates to Na+ + OH- in water.
Occurrence & preparation
Chlor-alkali electrolysis of brine.
Uses
- Soap making
- pH adjustment
Safety
Corrosive — severe eye and skin burns.
Consult current SDS. — consult current SDS before handling.