Commodity: Sodium Silicofluoride
Molecular Formula:Na2SiF6
Name often Used: Sodium Fluorosilicate
Product Description
white powder crystals
Molecular Weight: 188.05
Appearance and Odor: White, odorless, granular, crystalline material.Specific Gravity (H2O=1): 2.679
Melting Point: Decomposes @ 500°C
Bulk Density 90 lbs/Ft3
Solubility in Water:
0.76 grams/100 ml of water @ 25°C
2.45 grams/100 ml of water @ 100°C
PH: 3.1

Properties It is colorless hexagonal, odorless and tasteless crystal with relative density 2.679. It is hygroscopic. It is soluble in ether, insoluble in alcohol. The solubility in acid is greater than in water. It decomposes in alkaline solution and produces sodium fluoride and silicon dioxide. It is decomposed to sodium fluoride and silicon tetrafluoride by heating to 300℃. It is noxious!

Item	Excellent grade	Grade I	Grade II
Sodium fluorosilicate(based on dry)	％ ≥ 99.0	％ ≥ 98.5	％ ≥ 97.0
Iron(Fe)	％ ≤0.02	--	--
Free acid(based on HCI)	％ ≤ 0.1	％ ≤ 0.15	％ ≤ 0.20
Heave metal(based on Pb)	％ ≤0.02	％ ≤0.05	％ ≤0.05
Water-insoluble matter	％ ≤ 0.40	％ ≤ 0.50	％ ≤ 1.00
Loss on Drying at 105℃	％ ≤0.3	％ ≤0.4	％ ≤0.6
Fineness(through 250μm test bolter)	％ ≥90	％ ≥90	％ ≥90
Sulphate (as SO4ˉ)	％ ≤ 0.4	％ ≤ 0.5	％ ≤ 0.5