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Silver iodide

Description References

Silver iodide

CAS No.7783-96-2
Chemical Name:Silver iodide
CBNumber:CB3854334
Molecular Formula:AgI
Formula Weight:234.77
MOL File:7783-96-2.mol

Silver iodide Property

Melting point 557°C
Boiling point 1506°C
Density 5.68 g/mL at 25 °C (lit.)
RTECS VW4450000
solubility insoluble in acid solutions
form Solid
Specific Gravity 6.01
color Yellow
Odor odorless
Water Solubility 0.03 mg/L
Sensitive Light Sensitive
Crystal Structure Cubic, Sphalerite Structure - Space Group F(-4)3m
Merck 14,8516
Solubility Product Constant (Ksp) pKsp: 16.07
Exposure limits ACGIH: TWA 0.01 ppm
Stability Stability Light-sensitive. Incompatible with strong oxidizing agents.
CAS DataBase Reference 7783-96-2(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 81M6Z3D1XE
NIST Chemistry Reference Silver iodide(7783-96-2)
EPA Substance Registry System Silver iodide (AgI) (7783-96-2)
UNSPSC Code 12352302
NACRES NA.23

Safety

Risk Statements :36/37/38-53
Safety Statements :22-24/25
RIDADR :UN 3077 9 / PGIII
WGK Germany :3
F :8
TSCA :Yes
HazardClass :9
HS Code :28432900
Hazardous Substances Data :7783-96-2(Hazardous Substances Data)

NFPA 704:

	0
1		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H410-H400
Precautionary statements P273-P501

Silver iodide Price More Price(9)

Brand: Sigma-Aldrich(India)
Product number: 226823
Product name : Silver iodide
Purity: 99%
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Brand: Sigma-Aldrich(India)
Product number: 226823
Product name : Silver iodide
Purity: 99%
Packaging: 100G
Price: ₹14518.8
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Brand: Sigma-Aldrich(India)
Product number: 204404
Product name : Silver iodide
Purity: 99.999% trace metals basis
Packaging: 10G
Price: ₹16849.8
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Brand: ALFA India
Product number: ALF-011419-22
Product name : Silver iodide, 99.9% (metals basis)
Purity:
Packaging: 100g
Price: ₹30613
Updated: 2022/05/26
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Brand: ALFA India
Product number: ALF-011419-14
Product name : Silver iodide, 99.9% (metals basis)
Purity:
Packaging: 25g
Price: ₹6195
Updated: 2022/05/26
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Silver iodide Chemical Properties,Usage,Production

Description Silver iodide (AgI) precipitates as a yellow, odor- and tasteless solid. Silver iodide acts as a very effective nucleus for the formation of ice crystals. Silver iodide has an important advantage over mercury as a subject for study of electrochemical properties of interfaces. It is also used as a solid lubricant for power contacts. It is also used as a local antiseptic.
References [1] B. Vonnegut, The Nucleation of Ice Formation by Silver Iodide, Journal of Applied Physics, 1947, vol. 18, 593
[2] J. Lyklema and J. Th. G. Overbeek, Electrochemistry of silver iodide the capacity of the double layer at the silver iodide-water interface, Journal of Colloid Science, 1961, col. 16, 595-608
[3] Sylva Arnell and Gunnar Andersson, Silver Iodide as a Solid Lubricant for Power Contacts, Proceedings of the Forty-Seventh IEEE Holm Conference on Electrical Contacts, 2001
Chemical Properties Yellow Crystalline Powder
Physical properties Light yellow hexagonal crystals or powder; darkens on exposure to light; density 5.68 g/cm³ ; melts at 558°C; vaporizes at 1,506°C; insoluble in water, most acids and ammonium carbonate solution; moderately soluble in concentrated solutions of alkali chloride, bromide, and thiosulfate; readily soluble in solutions of alkali cyanides, iodides and in hot concentrated hydriodic acid.
Uses Silver iodide is a yellow powder formed by the combination of a soluble iodide combined with silver nitrate. Silver iodide could also be formed by exposing metallic silver to the fumes of bromine as in the daguerreotype process. This was the primary halide used for all of the 19th century camera processes until the introduction of the silver bromide gelatin plate. With the exception of the daguerreotype, all silver iodide processes relied on physical development using a reducing agent such as gallic acid, pyrogallic acid, or ferrous sulfate, an acid restrainer, and excess silver.
Uses Used in medicine for its caustic, astringent and antiseptic effects. Used in photography, and in the estimation of silver. Through heterogeneous nucleation, it is used in cloud seeding, relying on its beta-AgI crystal structure being similar to that of Ice.
Uses In cloud precipitation (rain-making).
Preparation Silver iodide is prepared by adding a solution of sodium or potassium iodide to a hot solution of silver nitrate: Ag+ (aq) + Iˉ (aq) → Ag I (s) The precipitate is washed with boiling water. The preparation is done in the dark under ruby red light.
Definition T3DB: Silver iodide is an iodide of silver. It is a photosensitive solid used in photography, as an antiseptic in medicine, and in rainmaking. Silver is a metallic element with the chemical symbol Ag and atomic number 47. It occurs naturally in its pure, free form, as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite.
Hazard Silver iodide may cause irritation and psoriasis, and the main hazards encountered in the use and handling of silver iodide arise from its toxicological properties. It is toxic by a variety of routes (i.e. inhalation, ingestion and dermal contact) and exposures may include rashes, conjunctivitis, psoriasis (permanent greyish-grey discolouration of the skin, conjunctiva, and internal organs), headache, fever, hypersensitivity reactions, laryngitis and bronchitis.
Health effects Silver itself is not toxic to humans, but most silver salts are. In large doses, silver and compounds containing it can be absorbed into the circulatory system and become deposited in various body tissues, leading to argyria, which results in a blue-grayish pigmentation of the skin, eyes, and mucous membranes. Argyria is rare, and although, so far as known, this condition does not otherwise harm a person's health, it is disfiguring and usually permanent. Mild forms of argyria are sometimes mistaken for cyanosis.
Flammability and Explosibility Non flammable