Magnesium Hexafluorosilicate
Title: Magnesium Hexafluorosilicate
CAS Registry Number: 16949-65-8
Additional Names: Magnesium silicofluoride; magnesium fluosilicate
Molecular Formula: F6MgSi
Molecular Weight: 166.38
Percent Composition: F 68.51%, Mg 14.61%, Si 16.88%
Line Formula: MgSiF6
Literature References: Review of toxicology of fluorine compounds: G. L. Waldbott, Acta Med. Scand. Suppl. 400, 1-44 (1963).
Properties: LD in guinea pigs (mg/kg): 200 orally, 400 s.c. (Waldbott).
Toxicity data: LD in guinea pigs (mg/kg): 200 orally, 400 s.c. (Waldbott)
 
Derivative Type: Hexahydrate
CAS Registry Number: 18972-56-0
Molecular Formula: F6MgSi.6H2O
Molecular Weight: 274.47
Percent Composition: F 41.53%, Mg 8.86%, Si 10.23%, H 4.41%, O 34.98%
Properties: White, efflorescent, odorless crystals. d 1.788. At ~120° loses SiF4. Soluble in water. Insol in alcohol. pH of 1% aq soln: 3.1.
Density: d 1.788
 
Use: For mothproofing of textile fabrics.

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