- In detail
Molecular Formula: Na2SiF6
Molecular Weight: 188.06
Class 6.1 H.S-NO 2826.2000
Property: 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!
Packing:Net each in 25kg plastic woven bag, lined with PE bag.
Usage: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.
(based on dry)
|Free acid(based on HCI)||0.1%max||0.15%max||0.05%max|
|Loss on Drying at 105°C||0.3%max||0.4%max||0.6%max|
|Fineness(through 250μm test bolter)||90%min||90%min||90%min|
|Heave metal(based on Pb)||0.02%max||0.05%max||0.055max|