Sodium Fluorosilicate
Sodium Silica Fluoride
- CAS
- 16893-85-9
- EC
- 240-934-8
- Sectors
- Water & Wastewater Treatment, Agriculture, Building & Construction
Sodium Fluorosilicate (CAS 16893-85-9) is sodium hexafluorosilicate, a white crystalline solid used as a fluoride source for municipal water fluoridation and as an insecticidal dust for crops, with additional use in concrete hardening and vitreous enamel opacifiers. Synthesized from silicon tetrafluoride, aligned with industry fluorides and EFSA fluoride additives.
Typical Properties
| Molecular formula | F6Si.2Na |
|---|---|
| Molecular weight | 188.06 g/mol |
| Appearance | Sodium hexafluorosilicate is a white crystalline solid. |
| Form | Crystals |
| Color | White |
| Odor | odorless |
| Melting point | melts at red heat, decomposing [MER06] |
| Boiling point | 620°C[at 101 325 Pa] |
| Density | 2.7 g/cm³ |
| GHS signal word | Danger · Acute toxicity |
| HS code | 2826908090 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Sodium Fluorosilicate
Applications
Water fluoridation in municipalities; opacifiers in vitreous enamels; insecticidal dusts for crops; concrete additives for hardening; and glass manufacturing aids.
Safety & Risks
Fluoride toxicity causes nausea and bone issues; dust inhalation is hazardous. Aquatic persistent; calcium antidotes ready.
Packaging
Packaged in 25 kg lined polypropylene sacks with ties. Secure in fluorosilicate ventilated zones with spill kits.