KOH
Compound · Base
Potassium hydroxide
氢氧化钾 (苛性钾)
Potassium hydroxide (氢氧化钾 (苛性钾)), formula KOH, is a base with a molar mass of 56.11 g/mol (CAS 1310-58-3). White solid, deliquescent; very soluble in water, exothermic.
Key facts
| Molar mass | 56.11 g/mol |
|---|---|
| Category | Base |
| State at 25°C | Solid |
| CAS | 1310-58-3 |
Structure
K⁺ [O–H]⁻
Ionic compound, a strong base
Physical properties
| Appearance | White solid, deliquescent |
|---|---|
| Melting point | 360 °C |
| Boiling point | 1327 °C |
| Density | 2.04 g/cm³ |
| Solubility | Very soluble in water, exothermic |
Key reactions
KOH + HCl → KCl + H₂O
Neutralisation with acid
2KOH + CO₂ → K₂CO₃ + H₂O
Absorbs carbon dioxide
Main uses
- Soft and liquid soap production
- Electrolyte in alkaline batteries
- Catalyst for biodiesel
Hazard
HighStrong caustic base; burns skin and eyes
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.