30315-M

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: reag. ISO; reag. Ph. Eur.
• Quality Level: 100
• vapor pressure: 1 mmHg ( 745 °C)
• grade: puriss. p.a.
• Assay: ≥99.0%; 99.0-100.5% (calc. to the dried substance)
• form: crystalline
• impurities: Reducing substances, complies; ≤0.0005% heavy metals (as Pb); ≤0.005% thiosulfate (S₂O₃); ≤0.02% free alkali (as KOH); ≤10 ppm total nitrogen (N)
• loss: ≤0.2% loss on drying, 105 °C
• pH: 6-8 (20 °C, 5%)
• mp: 681 °C (lit.)
• anion traces: bromide, chloride (as Cl^-): ≤100 ppm; iodate (IO₃^-): ≤2 ppm; phosphate (PO₄^3-): ≤10 ppm; sulfate (SO₄^2-): ≤10 ppm
• cation traces: As: ≤0.00001%; Ba: ≤0.002%; Ca: ≤0.001%; Fe: ≤0.0003%; Mg: ≤0.001%; Na: ≤0.03%
• 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 an inorganic potassium salt. It is used as an iodide ion source for nucleophilic displacement reactions and acts as a mediator during the electrochemical oxidations of aldehydes. In presence of an acid, KI cleaves some ethers. KI reacts with sulfonyl chlorides to produce symmetrical thiosulfonic S-esters. In the presence of oxidizing agents, KI iodinates aromatic compounds and organothallium compounds.

Application

Potassium iodide is used:

• As a solid base catalyst loaded with alumina for transesterification of soybean oil with methanol.
• As a iodide source in the solvothermal synthesis of BiOI (bismuth oxyiodide) microspheres using ethylene glycol solvent.
• In the synthesis of RGO (reduced graphene oxide) from GO (graphite oxide) in presence of HCl–KI mixture.

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: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable