Potassium iodide
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Chemical formula | {{#Chem:KI}} |
---|---|
Molar Mass(g/mol) | 168.0028 |
Density(g/cc) | 3.123 |
Melting Point(°C) | 681 |
Boiling Point(°C) | 1330 |
Solubility in water(g/L) | 1400 |
Solubility in ethanol(g/L) | 20 |
NFPA 704 |
Uses
Primary
- Pharm: WHO LEM dietary supplement
- Thyroid protection
Natural occurrence
- Potassium iodide occurs in kelp
Hazards
Production
Extraction
Synthesis
- Combine iodine with potassium hydroxide in water and heat.
- {{#Chem: 3I2 + 6KOH(aq) {= heat} 5KI + KIO3 + 3H2O}}
- Chill the solution to precipitate the iodate
- Filter
- Residue is potassium iodate
- evaporate filtrate to dryness, leaving potassium iodide.