Sodium hexafluorosilicate
Sodium hexafluorocilicate is typically used as an additive for; water fluoridation, opal glass, ore refining, fluoride chemical production (e.g. sodium fluoride, magnesium silicofluoride, cryolite, aluminum fluoride). It is also used as viscosity modifier for solution, suspension or emulsion and as dispersing aid for insoluble solids. Forms a gel in water.
Details
Chemical Formula
Na2SiF6
REACH Registered by W&F
Yes
EC Number
240-934-8
CAS Number
16893-85-9
Industries
- Industry chemicals
- Surface treatment & Coatings
Applications
- Water treatment
- Glass & Ceramics
- Foundry
- Processing aid
- Intermediate
Specification
- Assay (gravimetry): ≥99%
- Loss of weight on drying at 105 °C: ≤0.30%
- Free acid (HCl): ≤0.10%
- Chlorides (Cl⁻): ≤0.15%
- Sulphates (SO₄²⁻): ≤0.25%
- Iron (Fe): ≤0.02%
- Water insolubility: ≤0.40%
- Phosphorous pentoxide (P₂O₅): ≤0.01%
- Lead (Pb): ≤0.01%
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