1. sodium fluorosiliate 99% min for water treament,meet AWWA 2. export 1500mt/month to worldwide 3. CAS: 16893-85-9
Name: Sodium Fluorosilicate ,Sodium Silicofluoride,
Formula: Na2SiF6
Molecular: 188.06
Execute standard: National standard/GB 23936-2009
Executive:
White crystalline powder,odorless, relative density: 2.679 g/cm3, hygroscopic.Soluble in ether, insoluble in alcohol. Decomposed in alkaline solution, forming NAF AND SiO2. In the searing heat(abpve 300°C),it is broken down into NaF and SiO4;toxic.
AWWA/NSF/UL Grade Portable Water Treatment
Chemical Analysis | Typical |
Assay (Na2SiF6) | ≥98.5% |
Fluorine(F) | ≥59.43% |
Moisture as H2O | ≤0.5% |
Water Insoluble Matter | ≤0.5% |
Heavy Metals,as Lead (Pb) | 50ppm Max |
Specific impurity limits in milligrams per kilogram of Na2SiF6
Impurity | Limit-mg/kg | Impurity | Limit-mg/kg |
Antomy | 990 | Mercury | 346 |
Arsenic | 495 | Molybenum | 3,465 |
Cadmium | 198 | Nickel | 3,960 |
Chromium | 2,475 | Selenium | 495 |
Lead | 495 |
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Physical Properties
Description: Dry crystalline non-hygroscopic salt, meeting AWWA StandardB-702,and the NSF/ANSI Standard 60 for Fluoride Fluorosiicate.
Specification Gravity (H2O=1): 2.679
Boiling Proint: Decomposes at 500 °C (932 .F)
Molecular Weight: 188.05
Solubility in Water:
0.76 grams/100 ml of water @ 25°C
2.45 grams/100 ml of water @ 100 °C
Guaranteed Screens:
≥89% through 40 mesh
≤25% through 325 mesh
Ph (1% Solution): 3.0-4.5
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