60239

Potassium fluoride

puriss. p.a., ≥99.0% (F)

• Formule linéaire : KF
• Numéro CAS: 7789-23-3
• Poids moléculaire : 58.10
• Numéro Beilstein : 3902818
• Numéro CE : 232-151-5
• Numéro MDL: MFCD00011398
• Code UNSPSC : 12352302
• ID de substance PubChem : 329758836

Propriétés

• Qualité: puriss. p.a.
• Pureté: ≥99.0% (F)
• Forme: powder or crystals
• Impuretés: ≤0.01% free acid (as HF); ≤0.01% free alkali (as KOH); ≤0.1% potassium fluoro silicate (K₂SiF₆)
• Pf: 858 °C (lit.)
• Traces d'anions: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤100 mg/kg
• Traces de cations: Ag: ≤5 mg/kg; Al: ≤5 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤5000 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Sr: ≤5 mg/kg; Tl: ≤5 mg/kg; Zn: ≤5 mg/kg
• Chaîne SMILES: [F-].[K+]
• InChI: 1S/FH.K/h1H;/q;+1/p-1
• Clé InChI: NROKBHXJSPEDAR-UHFFFAOYSA-M

Description

Description générale

Potassium fluoride (KF) on activated alumina is a highly reactive catalyst (basic in nature) for various organic reactions. High reactivity is due to the formation of potassium hexafluoroaluminiate, potassium hydroxide and potassium aluminate on the interaction of its fluoride ion with alumina. Celite coated with potassium fluoride participates in various hydrogen-bond-mediated reactions. Potassium fluoride on basic alumina in acetonitrile has been employed for the ultrasound-assisted deprotection of tert-butyldimethylsilyl ethers of phenols. Neutralization reaction of hydrofluoric acid with KOH or postassium carbonate affords KF.

Application

A versatile fluoride ion source used in a study of ion-specific swelling and de-swelling of ampholytic polymer gels, in the room temperature oxidation of noble metals in HF, and in the measurement of electronic polarizabilities of ions in polymers of alkali halides.

Autres remarques

Reagent for the decomposition of silicates by fusion

Informations sur la sécurité

• Pictogrammes: GHS06,GHS05
• Mention d'avertissement: Danger
• Mentions de danger: H301 + H311 + H331,H318
• Conseils de prudence: P261 - P280 - P301 + P310 - P302 + P352 + P312 - P304 + P340 + P311 - P305 + P351 + P338
• Classification des risques: Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Dam. 1
• Code de la classe de stockage: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable