Potassium iodide

• CAS: 7681-11-0
• Catalog Number: ACM7681110
• Category: Metal & Ceramic Materials
• Molecular Weight: 166.003
• Molecular Formula: IK
• Description: Potassium iodide is an inorganic compound with the chemical formula KI. This white salt is the most commercially significant iodide compound, with approximately 37,000 tons produced in 1985. It is less hygroscopic (absorbs water less readily) than sodium iodide, making it easier to work with. Potassium iodide occurs naturally in kelp. Kelp’s iodide content can range from 89 µg/g to 8165µg/g.Aged and impure samples are yellow because of the slow oxidation of the salt to potassium carbonate and elemental iodine.Potassium iodide is medicinally used for thyroid blockade, thyroid storm and also as an expectorant. It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.
• Synonyms: Potassium monoiodide
• IUPAC Name: Potassium;iodide
• Canonical SMILES: [K+].[I-]
• InChI: InChI=1S/HI.K/h1H;/q;+1/p-1
• InChI Key: NLKNQRATVPKPDG-UHFFFAOYSA-M
• Boiling Point: 184 °C
• Melting Point: 681 °C
• Flash Point: 1330 °C
• Density: 1.7 g/cm³
• Solubility: Slightly soluble in ethanol
• Appearance: Yellow crystals
• Application: Potassium iodide serves multiple critical purposes, primarily as a source of iodine essential for maintaining thyroid health and preventing disorders such as goiter. It is utilized as a supplement in table salt and animal feed to address iodine deficiencies. In medical contexts, potassium iodide plays a pivotal role in regulating thyroid function and is used to protect the thyroid gland from radioactive iodine exposure following environmental contamination by iodine-131. This compound also finds applications in photography, particularly in the production of photographic emulsions and processes, due to its ability to dissolve iodine and form the triiodide ion. Additionally, it is an essential analytical reagent, used in animal chemistry, and offers therapeutic benefits as a radical scavenger, expectorant, and treatment for conditions like sporotrichosis, erythema nodosum, and nodular vasculitis. Its versatility and effectiveness across various fields underscore its significance as an indispensable chemical compound.
• Storage: 2-8 °C
• Autoignition Temperature: Not flammable (USCG, 1999)
• Color/Form: Colorless or white, cubical crystals, white granules, or powder;HEXAHEDRAL CRYSTALS, EITHER TRANSPARENT OR SOMEWHAT OPAQUE
• Complexity: 2
• Covalently-Bonded Unit Count: 2
• EC Number: 231-659-4
• Exact Mass: 165.86818
• Formal Charge: 0
• Hazard Codes: C
• H-Bond Acceptor: 1
• H-Bond Donor: 0
• Heavy Atom Count: 2
• HS Code: 2827600000
• LogP: -2.99600
• MDL Number: MFCD00011405
• Monoisotopic Mass: 165.86818
• NSC Number: 77362
• Odor: Odorless
• Other Experimental: Slightly deliquescent in moist air; on long exposure to air becomes yellow due to liberation of iodine, small amount of iodate may be formed; light and moisture accelerate the decomposition; aqueous solution becomes yellow in time due to oxidation, but a small amount of alkali prevents it;30 g KI with 21 mL water gives 30 mL of a saturated solution at 25 °C;Slightly hygroscopic in moist air;Readily dissolves elemental iodine /Potassium iodide solution/
• Refractive Index: 1.677
• RIDADR: UN 2056 3/PG 2
• Rotatable Bond Count: 0
• Stability: Stable. Protect from light and moisture. Incompatible with strong reducing agents, strong acids, steel, aluminium, alkali metals, brass, magnesium, zinc, cadmium, copper, tin, nickel and their alloys.
• Storage Conditions: Store at RT.
• Topological Polar Surface Area: 0 Ų
• UNII: 1C4QK22F9J
• Vapor Density: 9
• Vapor Pressure: 0.31 mm Hg ( 25 °C)
• WGK Germany: 2

Custom Q&A

What is the molecular formula of potassium iodide?

The molecular formula of potassium iodide is KI.

What is the molecular weight of potassium iodide?

The molecular weight of potassium iodide is 166.0028 g/mol.

What are the synonyms for potassium iodide?

The synonyms for potassium iodide include Thyro-Block, Kali iodide, Thyroshield, and more.

What is the IUPAC name of potassium iodide?

The IUPAC name of potassium iodide is potassium;iodide.

What is the InChIKey of potassium iodide?

The InChIKey of potassium iodide is NLKNQRATVPKPDG-UHFFFAOYSA-M.

What is the canonical SMILES of potassium iodide?

The canonical SMILES of potassium iodide is [K+].[I-].

What is the CAS number of potassium iodide?

The CAS number of potassium iodide is 7681-11-0.

What is the UNII of potassium iodide?

The UNII of potassium iodide is 1C4QK22F9J.

What is the ChEMBL ID of potassium iodide?

The ChEMBL ID of potassium iodide is CHEMBL1141.

What is the Wikipedia page for potassium iodide?

The Wikipedia page for potassium iodide is "Potassium iodide".