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
• 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))

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).

Safety Information

• Signal Word: Danger
• Target Organs: Thyroid,Liver
• 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
• Pictograms: GHS08,GHS07
• Hazard Codes: H319,H360FD,H373
• Precautionary Statements: P202 - P260 - P264 - P280 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: Eye Irrit. 2 - Repr. 1B - STOT RE 2 Oral