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Silver iodide information


Silver iodide
Silver iodide
Names
IUPAC name
Silver(I) iodide
Other names
Argentous iodide
Identifiers
CAS Number
  • 7783-96-2 checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 22969 checkY
ECHA InfoCard 100.029.125 Edit this at Wikidata
EC Number
  • 232-038-0
PubChem CID
  • 6432717
UNII
  • 81M6Z3D1XE checkY
CompTox Dashboard (EPA)
  • DTXSID0064836 Edit this at Wikidata
InChI
  • InChI=1S/Ag.HI/h;1H/q+1;/p-1 checkY
    Key: MSFPLIAKTHOCQP-UHFFFAOYSA-M checkY
  • InChI=1/Ag.HI/h;1H/q+1;/p-1
    Key: MSFPLIAKTHOCQP-REWHXWOFAV
SMILES
  • [Ag]I
Properties
Chemical formula
 AgI
Molar mass 234.77 g/mol
Appearance yellow, crystalline solid
Odor odorless
Density 5.68 g/cm3, solid[1]
Melting point 558 °C (1,036 °F; 831 K)[1]
Boiling point 1,506 °C (2,743 °F; 1,779 K)[1]
Solubility in water
 0.03 mg/L (20 °C)[1]
Solubility product (Ksp)
8.52 × 10 −17[2]
Magnetic susceptibility (χ)
 −80.0·10−6 cm3/mol[3]
Structure[5]
Crystal structure
 Hexagonal, hP4
Space group
 P63mc, No. 186
Lattice constant
a = 0.4591 nm, c = 0.7508 nm
α = 90°, β = 90°, γ = 120°
Formula units (Z)
 2
Dipole moment
 4.55 D[4]
Thermochemistry[6]
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:[7]
Pictograms
 GHS09: Environmental hazard
Signal word
 Warning
Hazard statements
 H410
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
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).
☒N verify (what is checkY☒N ?)
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.

  1. ^ a b c d Haynes, p. 4.84
  2. ^ Haynes, p. 5.178
  3. ^ Haynes, p. 4.130
  4. ^ Haynes, p. 9.65
  5. ^ Yoshiasa, A.; Koto, K.; Kanamaru, F.; Emura, S.; Horiuchi, H. (1987). "Anharmonic thermal vibrations in wurtzite-type AgI". Acta Crystallographica Section B: Structural Science. 43 (5): 434–440. Bibcode:1987AcCrB..43..434Y. doi:10.1107/S0108768187097532.
  6. ^ Haynes, p. 5.35
  7. ^ "C&L Inventory". echa.europa.eu. Retrieved 15 December 2021.

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Silver iodide

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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...

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Cloud seeding

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as cloud condensation or ice nuclei. Common agents include silver iodide, potassium iodide, and dry ice, with hygroscopic materials like table salt gaining...

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Iodide

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solubility of silver iodide and lead iodide reflects the covalent character of these metal iodides. A test for the presence of iodide ions is the formation...

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Rubidium silver iodide

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Rubidium silver iodide is a ternary inorganic compound with the formula RbAg4I5. Its conductivity involves the movement of silver ions within the crystal...

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Potassium iodide

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Potassium iodide is a chemical compound, medication, and dietary supplement. It is a medication used for treating hyperthyroidism, in radiation emergencies...

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Silver halide

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may each combine with silver to produce silver bromide (AgBr), silver chloride (AgCl), silver iodide (AgI), and four forms of silver fluoride, respectively...

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Silver chloride

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iodide, as well as a variety of ligands (see silver halide). For AgBr and AgI, the Ksp values are 5.2 x 10−13 and 8.3 x 10−17, respectively. Silver bromide...

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Silver

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hypochlorite treatments do, colloidal silver is not effective enough for more contaminated open swimming pools. Small silver iodide crystals are used in cloud seeding...

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Silver nitrate

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the halide: white (silver chloride), pale yellow/cream (silver bromide), yellow (silver iodide). AgBr and especially AgI photo-decompose to the metal,...

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Iodine

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of these elements. Silver iodide is a major ingredient to traditional photographic film. Thousands of kilograms of silver iodide are used annually for...

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Project Stormfury

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seeding with silver iodide. The project was run by the United States Government from 1962 to 1983. The hypothesis was that the silver iodide would cause...

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Calotype

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introduced in 1841 by William Henry Fox Talbot, using paper coated with silver iodide. Paper texture effects in calotype photography limit the ability of...

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Cloud seeding in the United Arab Emirates

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lasting for a few hours. Cloud seeding missions require firing salts and silver iodide crystals into the atmosphere. The increased concentration of particulate...

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Weather modification

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precipitation. Cloud seeding entails spraying small particles, such as silver iodide, onto clouds to attempt to affect their development, usually with the...

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Silver bromide

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Silver bromide (AgBr) is a soft, pale-yellow, water-insoluble salt well known (along with other silver halides) for its unusual sensitivity to light. This...

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Zeisel determination

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test tube saturated with silver nitrate. Any alkyl iodide present will give a reaction with the silver compound to silver iodide which has a red or yellow...

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History of the camera

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high-contrast and extremely sharp image by exposing on a plate coated with silver iodide, and exposing this plate again to mercury vapor.: 6  By 1837, he was...

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Bernard Vonnegut

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was an American atmospheric scientist credited with discovering that silver iodide could be used effectively in cloud seeding to produce snow and rain...

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Iodargyrite

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Iodyrite or iodargyrite is a natural mineral form of silver iodide. Related minerals are chlorargyrite and bromargyrite. Warr, L.N. (2021). "IMA–CNMNC...

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Photograph

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concentrated on silver halide-based alternatives. He exposed a silver-plated copper sheet to iodine vapor, creating a layer of light-sensitive silver iodide; exposed...

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Beijing Weather Modification Office

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nationwide, who seed clouds by firing rockets and shells loaded with silver iodide into them. According to Zhang Qiang, head of the Office, cloud seeding...

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Kurt Vonnegut

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His brother Bernard had worked at GE since 1945, focusing mainly on a silver-iodide-based cloud seeding project that quickly became a joint GE-U.S. Army...

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Rainmaking

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airplanes or rockets to sow to the clouds with catalysts such as dry ice, silver iodide and salt powder, to make clouds rain or increase precipitation, to remove...

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Dry ice

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experiments in the US in the 1950s and early 1960s before it was replaced by silver iodide. Dry ice has the advantage of being relatively cheap and completely...

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Daguerreotype

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1774)—meant that silver photographic processes that rely on the reduction of silver iodide, silver bromide and silver chloride to metallic silver became feasible...

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Operation Popeye

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existed. A report titled Rainmaking in SEASIA outlines use of lead iodide and silver iodide deployed by aircraft in a program that was developed in California...

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Louis Daguerre

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exposed a thin silver-plated copper sheet to the vapour given off by iodine crystals, producing a coating of light-sensitive silver iodide on the surface...

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List of inorganic compounds

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AgCNO Silver hydroxide – AgOH Silver iodide – AgI Silver nitrate – AgNO3 Silver nitride – Ag3N Silver oxide – Ag2O Silver perchlorate – AgClO4 Silver permanganate...

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