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Potassium iodide

Name: Potassium iodide
Brand: SIGALD

puriss. p.a., reag. ISO, reag. Ph. Eur., ≥99.0%

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About This Item

Linear Formula:

CAS Number:

7681-11-0

Molecular Weight:

166.00

NACRES:

NA.21

PubChem Substance ID:

329753460

UNSPSC Code:

12352302

EC Number:

231-659-4

MDL number:

MFCD00011405

Assay:

≥99.0%, 99.0-100.5% (calc. to the dried substance)

Form:

solid

Solubility:

water: complete (ca.1,430 g/l at 25 °C (77 °F))

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Properties

Quality Segment

200

agency

USP/NF, reag. ISO, reag. Ph. Eur.

vapor pressure

1 mmHg ( 745 °C)

description

REDUCING SUBSTANCES complying

grade

puriss. p.a.

assay

≥99.0%, 99.0-100.5% (calc. to the dried substance)

form

solid

impurities

≤0.0005% heavy metals (as Pb), ≤0.001% total nitrogen (N), ≤0.005% thiosulfate (S₂O₃), ≤0.02% free alkali (as KOH)

loss

≤0.5% loss on drying, 105 °C

pH

6.0-8.0 (20 °C, 5%)

mp

681 °C (lit.)

solubility

water: complete (ca.1,430 g/l at 25 °C (77 °F))

anion traces

bromide, chloride (as Cl^-): ≤100 mg/kg, iodate (IO₃^-): ≤2 mg/kg, phosphate (PO₄^3-): ≤10 mg/kg, sulfate (SO₄^2-): ≤10 mg/kg

cation traces

As: ≤0.1 mg/kg, Ba: ≤20 mg/kg, Ca: ≤10 mg/kg, Fe: ≤3 mg/kg, Mg: ≤10 mg/kg, Na: ≤300 mg/kg

SMILES string

[K+].[I-]

InChI

1S/HI.K/h1H;/q;+1/p-1

InChI key

NLKNQRATVPKPDG-UHFFFAOYSA-M

Description

General description

Potassium iodide (KI) is a chemical compound that can be used as an iodide ion source for nucleophilic displacement reactions. During the electrochemical oxidation of aldehydes, it acts as a mediator. In the presence of an acid, it can cleave some ethers. KI can iodinate aromatic and organothallium compounds in the presence of an oxidizing agent. Additionally, it can form symmetrical thiosulfonic S-esters by reacting with sulfonyl chlorides.

Application

Potassium iodide is used as:

An iodine source in the synthesis of 1-iodoalkynes and iodophenols from alkynes and phenols using tert-butyl hydroperoxide (TBHP) as oxidant.
A catalyst in the synthesis of sulfonated oxindoles by arylsulfonylation of activated alkenes using sulfonylhydrazides as sulfonyl precursor, and water as solvent.
An oxidative degradation inhibitor to reduces oxidative degradation of monoethanolamine (MEA).

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signalword

Danger

target_organs

Thyroid

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

flash_point_f

Not applicable

flash_point_c

Not applicable

Hazard Classifications

Eye Irrit. 2 - Repr. 1B - STOT RE 2

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