Silver iodide
| Names | |
|---|---|
| IUPAC name
Silver(I) iodide | |
| Other names
Argentous iodide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.029.125 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| AgI | |
| Molar mass | 234.77 g/mol |
| Appearance | yellow, crystalline solid |
| Odor | odorless |
| Density | 5.68 g/cm3, solid |
| Melting point | 558 °C (1,036 °F; 831 K) |
| Boiling point | 1,506 °C (2,743 °F; 1,779 K) |
| 0.03 mg/L (20 °C) | |
Solubility product (Ksp) |
8.52 × 10 −17 |
| Solubility | very soluble in liquid ammonia |
| −80.0·10−6 cm3/mol | |
| Structure | |
| Hexagonal, hP4 | |
| P63mc, No. 186 | |
a = 0.4591 nm, c = 0.7508 nm α = 90°, β = 90°, γ = 120° | |
Formula units (Z) |
2 |
| 4.55 D | |
| Thermochemistry | |
Heat capacity (C) |
56.8 J·mol−1·K−1 |
Std molar entropy (S⦵298) |
115.5 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−61.8 kJ·mol−1 |
Gibbs free energy (ΔfG⦵) |
−66.2 kJ·mol−1 |
| Hazards | |
| GHS labelling: | |
| Warning | |
| H410 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Safety data sheet (SDS) | Sigma-Aldrich |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Silver iodide is an inorganic compound with the formula AgI. The compound is a bright yellow solid, but samples almost always contain impurities of metallic silver that give a grey colouration. The silver contamination arises because some samples of AgI can be highly photosensitive. This property is exploited in silver-based photography. Silver iodide is also used as an antiseptic and in cloud seeding.