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Sodium Fluorosilicate

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℃),it is broken down into NaF and SiO4;toxic.
AWWA/NSF/UL Grade Portable Water Treatment

 Chemical Analysis

Typical

Chemical Analysis

Typical

Assay (Na2SiF6)

≥98.5%

Water Insoluble Matter

≤0.5%

Fluorine(F)

≥59.43%

Heavy Metals,as Lead (Pb)

50ppm Max

Moisture as H2O

≤0.5%

 

 

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

 

 

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 ℃ (932 。F)
Molecular Weight: 188.05
Solubility in Water: 0.76 grams/100 ml of water @ 25℃
2.45 grams/100 ml of water @ 100 ℃
Guaranteed Screens: ≥89% through 40 mesh
≤25% through 325 mesh
Ph (1% Solution): 3.0-4.5