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potassium-iodide

Potassium Iodide

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.[1] Kelp’s iodide content can range from 89 µg/g to 8165 µg/g.[2]

SKU: wpo_04.

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Product Description


IUPAC name
Potassium iodide

CAS Number 7681-11-0
ChEBI CHEBI:8346
ChEMBL ChEMBL1141
ChemSpider 4709
DrugBank DB06715
Jmol interactive 3D Image
KEGG D01016
PubChem 4875
RTECS number TT2975000
UNII 1C4QK22F9J
InChI[show]
SMILES[show]

Chemical formula KI
Molar mass 166.0028 g/mol
Appearance white crystalline solid
Density 3.123 g/cm3
Melting point 681 °C (1,258 °F; 954 K)
Boiling point 1,330 °C (2,430 °F; 1,600 K)
Solubility in water 128 g/100 ml (0 °C)
140 g/100 mL (20 °C)
176 g/100 mL (60°C)
206 g/100 mL (100°C)
Solubility 2 g/100 mL (ethanol)
soluble in acetone (1.31 g/100 mL)
slightly soluble in ether, ammonia
Refractive index (nD) 1.677
Viscosity 1.0227 cP (733 °C)

Crystal structure cubic

Specific
heat capacity (C)
52.73 J/mol K
Std enthalpy of
formation (ΔfHo298)
-327.6 kJ/mol

ATC code R05CA02
S01XA04, V03AB21

Safety data sheet External MSDS
NFPA 704

Other anions Potassium fluoride
Potassium chloride
Potassium bromide
Other cations Lithium iodide
Sodium iodide
Rubidium iodide
Caesium iodide