01302

Fluosilicic acid

purum, 33.5-35%

• Sinonimo/i: Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate
• Formula condensata: H₂SiF₆
• Numero CAS: 16961-83-4
• Peso molecolare: 144.09
• Numero MDL: MFCD00036289
• Codice UNSPSC: 12352300
• eCl@ss: 38130308
• ID PubChem: 57646695
• NACRES: NA.21

Proprietà

• Grado: purum
• Livello qualitativo: 200
• Concentrazione: 33.5-35%
• Impurezze: ≤0.003% heavy metals (as Pb)
• Densità: 1.22 g/mL at 20 °C (lit.); 1.31 g/mL at 25 °C
• Anioni in tracce: chloride (Cl^-): ≤0.2%; phosphate (PO₄^3-): ≤1000 mg/kg; sulfate (SO₄^2-): ≤0.2%
• Cationi in tracce: Fe: ≤100 mg/kg
• Stringa SMILE: F.F.F[Si](F)(F)F
• InChI: 1S/F4Si.2FH/c1-5(2,3)4;;/h;2*1H; ZEFWRWWINDLIIV-UHFFFAOYSA-N

Descrizione

Descrizione generale

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.

Applicazioni

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.

Informazioni sulla sicurezza

• Pittogrammi: GHS06,GHS05
• Avvertenze: Danger
• Indicazioni di pericolo: H302,H311,H314
• Consigli di prudenza: P270 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classi di pericolo: Acute Tox. 3 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1
• Codice della classe di stoccaggio: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• Classe di pericolosità dell'acqua (WGK): WGK 2
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable
• Dispositivi di protezione individuale: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter