01302

Fluosilicic acid

purum, 33.5-35%

• Synonyme(s) : Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate
• Formule linéaire : H₂SiF₆
• Numéro CAS: 16961-83-4
• Poids moléculaire : 144.09
• Numéro MDL: MFCD00036289
• Code UNSPSC : 12352300
• eCl@ss : 38130308
• ID de substance PubChem : 57646695
• Nomenclature NACRES : NA.21

Propriétés

• Qualité: purum
• Niveau de qualité: 200
• Concentration: 33.5-35%
• Impuretés: ≤0.003% heavy metals (as Pb)
• Densité: 1.22 g/mL at 20 °C (lit.); 1.31 g/mL at 25 °C
• Traces d'anions: chloride (Cl^-): ≤0.2%; phosphate (PO₄^3-): ≤1000 mg/kg; sulfate (SO₄^2-): ≤0.2%
• Traces de cations: Fe: ≤100 mg/kg
• Chaîne SMILES: F.F.F[Si](F)(F)F
• InChI: 1S/F4Si.2FH/c1-5(2,3)4;;/h;2*1H
• Clé InChI: ZEFWRWWINDLIIV-UHFFFAOYSA-N

Description

Description générale

High-silic fluoro silicic acids have been prepared. They have desired amount of extra silica upto 18% more than the composition as represented by H₂SiF₆. Preparation and properties of fluosilicic acid have been reported. Fluosilicic acid can be obtained as a major byproduct of phosphate fertilizer industry.It can be used in the preparation of sodium fluorosilicate, via neutralization with sodium chloride. It can also undergo neutralization with ammonia to produce ammonium fluoride and silica.

Application

Fluosilicic acid (FSA, H₂SiF₆) has been used in the following studies:

• Fluoridation of fluoridated municipal water supplies.
• Surface modification of calcium carbonate.
• Liquid phase deposition (LPD) of silica.

Informations sur la sécurité

• Pictogrammes: GHS06,GHS05
• Mention d'avertissement: Danger
• Mentions de danger: H302,H311,H314
• Conseils de prudence: P270 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classification des risques: Acute Tox. 3 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1
• Code de la classe de stockage: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter