Buy Potassium Iodide (KI) 99.0% High Purity Powder from MSE Supplies.

While potassium Iodide (KI) has several medical uses, it is also used in industry to make silver iodide. KI is also used in biomedical applications for fluorescence quenching. In organic synthesis it is used to make aryl iodides.

KI is used with silver nitrate to make silver iodide (AgI), an important chemical in film photography. KI is a component in some disinfectants and hair treatment chemicals. KI is also used as a fluorescence quenching agent in biomedical research, an application that takes advantage of collisional quenching of fluorescent substances by the iodide ion. However, for several fluorophores addition of KI in μM-mM concentrations results in increase of fluorescence intensity, and iodide acts as fluorescence enhancer.[30]

Potassium iodide is a component in the electrolyte of dye sensitized solar cells (DSSC) along with iodine.

Potassium iodide finds its most important applications in organic synthesis mainly in the preparation of aryl iodides in the Sandmeyer reaction, starting from aryl amines. Aryl iodides are in turn used to attach aryl groups to other organics by nucleophilic substitution, with iodide ion as the leaving group.

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Name	Potassium Iodide
Symbol	KI
CAS Number	7681-11-0
Molecular Weight (g/mol)	166.00
Density (g/cm³)	3.13
Melting Point (°C)	681
Boiling Point (°C)	1,330
Solubility in Water (g/L )	1400 @ 20°C
Color/Appearance	white powder
Purity	>99.0%
Loss on Drying	0.10%

Solar Cells