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Potassium iodide CAS 7681-11-0 AR500G AR1KG AR25KG

Identification

Product Name

Potassium iodide

CAS

7681-11-0

EC No.

231-659-4

Cat. No.

P1030810500; P1030811000; P1030819025

Formula

KI

M.W.

166.00

Synonyms

Potide; hydriodic acid potassium acid; Iodic acid potassium salt;

Application

For laboratory use; Potassium iodide is used in pharmaceutical formulations and in film photography as a source of iodine. It is widely used as an analytical Reagent in iodometric tritrations. Apart from its application as a source of iodide to produce organo iodine compounds such as in Sandmeyer reactions, potassium iodide finds extensive use as a nucleophilic catalyst for several alkylation reactions.

Specification

Assay ( KI )

99.0% min.

pH (50g/L solution, 25℃)

6.0-8.0

Clarity, No.

3 max.

Insoluble matter in water, %

0.01% max.

Sulfate (SO4), %

0.005% max.

Iodate and iodine (as IO3), %

0.002% max.

Phosphate (PO4), %

0.002% max.

Total nitrogen (N), %

0.002% max.

Sodium (Na), %

0.1% max.

Magnesium (Mg), %

0.002% max.

Calcium (Ca), %

0.002% max.

Iron (Fe), %

0.0003% max.

Arsenic (As), %

0.00002% max.

Barium (Ba) , %

0.002% max.

Heavy metals (as Pb), %

0.0005% max.

Chloride and bromide (as Cl), %

0.02% max.

Reducing substances

Passes test

Physical Data

Appearance

White crystalline powder.

Solubility

140g/100g water at 20℃(68℉).

Vapor pressure (mm Hg)

1 @745℃(1373℉)

Melting point

680℃(1256℉)

Boiling point

1330℃(2426℉)

Density

3.1g/ml at 25℃

Storage:

Keep in a tightly closed light-resistant container, stored in a cool, dry, ventilated area. Protect against physical damage. Isolate from incompatible substances.

Grade

AR

Packing

AR500G; AR1KG; AR25KG

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