30315

Potassium iodide

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

• Linear Formula: KI
• CAS Number: 7681-11-0
• Molecular Weight: 166.00
• EC Number: 231-659-4
• MDL number: MFCD00011405
• UNSPSC Code: 12352302
• PubChem Substance ID: 329753460
• NACRES: NA.21

Properties

• 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.)
• 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).

Safety Information

• Pictograms: GHS08
• Signal Word: Danger
• Hazard Statements: H372
• Precautionary Statements: P260 - P264 - P270 - P314 - P501
• Hazard Classifications: STOT RE 1 Oral
• Target Organs: Thyroid
• Storage Class Code: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable