Sodium iodide
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| Names | |
|---|---|
| IUPAC name
Sodium iodide
| |
| Other names
Sodium monoiodide
| |
| Properties | |
| Molar mass | 149.89 g/mol |
| Appearance | White solid |
| Odor | Odorless |
| Density | 3.67 g/cm3 |
| Melting point | 661 °C (1,222 °F; 934 K) |
| Boiling point | 1,304 °C (2,379 °F; 1,577 K) |
| 158.7 g/100 ml (0 °C) 184.2 g/100 ml (25 °C) 227.8 g/100 ml (50 °C) 294 g/100 ml (70 °C) 302 g/100 ml (100 °C) | |
| Solubility | Reacts with sulfuric acid Soluble in acetone, acetonitrile, ethanol, formamide, formic acid, isopropanol, methanol Slightly soluble in dimethylformamide, sulfur dioxide Insoluble in halocarbons, hydrocarbons |
| Solubility in acetamide | 32.3 g/100 g (41.5 °C) |
| Solubility in acetone | 50.4425 g/100 g (25 °C) |
| Solubility in acetonitrile | 24.9 g/100 g (25 °C) |
| Solubility in ammonia | 162 g/100 g (25 °C) |
| Solubility in dichloromethane | 0.009 g/100 g (25 °C) |
| Vapor pressure | ~0 mmHg |
| Thermochemistry | |
| Std molar
entropy (S |
91 J·mol−1·K−1 |
| Std enthalpy of
formation (ΔfH |
−288 kJ·mol−1 |
| Hazards | |
| Safety data sheet | Sigma-Aldrich |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
| LD50 (Median dose)
|
4.340 mg/kg (rat, oral) |
| Related compounds | |
| Related compounds
|
Potassium iodide |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Sodium iodide (NaI) is a chemical compound, a salt formed from sodium and iodine.
Contents
Properties
Chemical
Addition of a strong acid, like sulfuric acid will liberate iodine.
Physical
Sodium iodide is a colorless solid, soluble in water.
Availability
Sodium iodide is sold by chemical suppliers.
Preparation
Can be made by neutralizing sodium hydroxide, carbonate or bicarbonate with hydroiodic acid.
Another route is addition of iodine to sodium thiosulfate.
Projects
- Make hydrogen iodide and hydroiodic acid
- Make elemental iodine
- Finkelstein reaction
Handling
Safety
Sodium iodide has low toxicity.
Storage
In closed bottles.
Disposal
Can be recycled or dumped in trash.
