Sodium Silicofluoride 98-99%

Specifications:
Sodium Fluorosilicate
Formula: Na2SiF6
Molecular Weight:188.06
Execute standard: HG/T3252-2000
UN-NO:2674
Class:6.1
H. S. CODE:2826.2000
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'C. It is noxious!Usages:
It is used as antiseptic in timber industry, hygroscopic agent of acid-resisting concrete, solidifying agent in natural latex products, additive in plating with zinc, nickel, iron and filler in plastic and fluorinating agent in pharmaceuticals and drinking water. It is used to produce insecticide in pesticide industry and sodium fluoride in man-made cryolite.Specification
Item Excellent grade Grade I Grade II
Sodium fluorosilicate(based on dry) 99.0%Min 98.5%Min 97.0%Min
Iron(Fe) 0.02%Max -- --
Free acid(based on HCI) 0.1%Max 0.15%Max 0.20%Max
Heave metal(based on Pb) 0.02%Max 0.05%Max 0.05%Max
Water-insoluble matter 0.40%Max 0.50%Max 1.00%Max
Loss on Drying at 105'C 0.3%Max 0.4%Max 0.6%Max
Fineness(through 250um test bolter) 90%Min 90%Min 90%MinPacking:
In 25kg and 50 KG plastic woven bag lined with high pressure polyethylene plastic bag.Quality Standard: GB12268-90Annual Output:50,000Mts/Per Year
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