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Silver iodide

Catalog Number
ACM7783962
CAS Number
7783-96-2
Product Name
Silver iodide
Structure
Category
Electrolytes
Synonyms
Silvermonoiodide
IUPAC Name
Iodosilver
Molecular Weight
234.77
Molecular Formula
AgI;AgI
Canonical SMILES
[Ag]I
InChI
InChI=1S/Ag.HI/h;1H/q+1;/p-1
InChI Key
MSFPLIAKTHOCQP-UHFFFAOYSA-M
Boiling Point
1506 °C
Melting Point
557 °C
Purity
99%+
Density
5.68 g/mL at 25 °C (lit.)
Solubility
Insoluble in water
Appearance
Light yellow solid
Application
Silver iodide, a yellow crystalline powder, serves multiple purposes due to its unique properties. In medicine, it is valued for its caustic, astringent, and antiseptic effects, offering therapeutic benefits. Its photosensitivity makes it a vital component in photography, while in meteorology, its structural similarity to ice allows it to facilitate cloud seeding through heterogeneous nucleation, promoting precipitation. Silver iodide's utility extends to the estimation of silver content and serves as a solid lubricant for power contacts, showcasing its versatility across various fields.
Color/Form
Light yellow, powder; crystals are hexagonal or cubic
Complexity
2
Covalently-Bonded Unit Count
1
EC Number
232-038-0
Exact Mass
233.80956
Formal Charge
0
Heavy Atom Count
2
MeSH Entry Terms
silver iodide;silver iodide, 131I-labeled
Monoisotopic Mass
233.80956
Odor
Odorless
Other Experimental
Slowly attacked by boiling concn acids, not affected by hot soln of alkali hydroxides; slowly darkened by light.;It dissolves in the presence of excess iodide ion forming an AgI-2 complex; silver iodide exists in one of three crystal structures depending on the temp, a phenomenon frequently referred to as trimorphism. Below 137 °C, silver iodide is in the cold cubic, or gamma form; at 137-145.8 °C, it exists in the green-yellow colored hexagonal, or beta form; above 145.8 °C, the yellow cubic or alpha form of silver iodide is the stable crystal structure.;Silver iodide has the broadest wavelength sensitivity in the visible spectrum.
Rotatable Bond Count
0
Stability
LIGHT SENSITIVE;... SLOWLY DARKENED BY LIGHT.;Protect from light. Soln should be freshly prepared. /Colloidal silver iodide/;Protect from light. Soln should be freshly prepared. /Colloidal silver iodide/
Topological Polar Surface Area
0 Ų
Vapor Pressure
1 MM HG @ 820 °C
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