Stannous Fluoride
Title: Stannous Fluoride
CAS Registry Number: 7783-47-3
Additional Names: Tin difluoride
Trademarks: Fluoristan
Molecular Formula: F2Sn
Molecular Weight: 156.71
Percent Composition: F 24.25%, Sn 75.75%
Line Formula: SnF2
Literature References: Prepd by evaporating a soln of stannous oxide in hydrofluoric acid in the absence of oxygen: Gay-Lussac, Thénard, Mém. Phys. Chim. 2, 317 (1809); Nebergall et al., J. Am. Chem. Soc. 74, 1604 (1952); from tin and hydrogen fluoride: Muetterties, Inorg. Chem. 1, 342 (1962). Review: Kemmitt, Sharp, Adv. Fluorine Chem. 4, 186 (1965). Review of toxicology and human exposure: Toxicological Profile for Tin (PB2006-100006, 2005) 426 pp.
Properties: Monoclinic, lamellar plates. mp 213°. d25 4.57. Sol in water (about 30%). Forms an oxyfluoride, SnOF2, on exposure to air.
Melting point: mp 213°
Density: d25 4.57
Use: Dental caries prophylactic.

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