Stannous fluoride

Stannous fluoride

Chembox new
Name = Stannous fluoride
IUPACName = Tin(II) fluoride
OtherNames = Stannous fluoride
Section1 = Chembox Identifiers
CASNo = 7783-47-3

Section2 = Chembox Properties
Formula = SnF2
MolarMass = 156.69 g/mol
Appearance = colorless solid
Density = 4.57 g/cm3
Solubility = Soluble in water (~350 g/l at 20°C)
MeltingPt = 215°C
BoilingPt = 850°C

Section7 = Chembox Hazards
RPhrases = R22, R38, R41
SPhrases = S26, S39

Stannous fluoride, also known as tin(II) fluoride, is the chemical compound with the formula SnF2. This colourless solid is a common ingredient in toothpaste. In the enamel, it converts apatite into fluoroapatite, which is more resistant to attack by acids generated by bacteria. Sodium fluoride and sodium fluorophosphate perform similarly. Stannous fluoride can be mixed with calcium abrasives while the more common sodium fluoride gradually becomes biologically inactive combined with calcium. [cite journal | date = April 1989 | journal = Journal of Dentistry | volume = 17 | issue = 2 | pages = 47–54 | pmid = 2732364 | title = The State of Fluorides in Toothpastes. | doi = 10.1016/0300-5712(89)90129-2 | last = Hattab | first = F. ] It has also been shown to be more effective than sodium fluoride in controlling gingivitis. [cite journal | date=1995 | journal = The Journal of Clinical Dentistry | volume = 6 | issue = Special Issue | pages = 54–58 | pmid = 8593194 | title = The clinical effect of a stabilized stannous fluoride dentifrice on plaque formation, gingivitis and gingival bleeding: a six-month study. ]

Stannous fluoride was used (under the trade name Fluoristan) in the original formulation of the toothpaste CrestFact|date=April 2008., though it was later replaced with sodium monofluorophosphateFact|date=April 2008. However it is the active ingredient in Crest Pro Health brand toothpaste according to the label on the box and the tube. Crest Pro Health also issues a warning on the tube that stannous fluoride may cause staining; and that by proper brushing this can be avoided; and that their particular formulation is resistant to staining.

Used in combination with abrasives that contain calcium, sodium fluoride is ineffective; stannous fluoride remains effective when used with such abrasives. Stannous fluoride can cause surface staining of teeth, but these stains are not permanent.

References


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См. также в других словарях:

  • stannous fluoride — A preparation containing not less than 71.2% of stannous tin and not less than 22.3% nor more than 25.5% of fluoride; used as a prophylactic against caries in dentistry. * * * stannous fluoride n a white compound SnF2 of tin and fluorine used in… …   Medical dictionary

  • stannous fluoride — noun a white powder that is used to fluoridate toothpaste • Hypernyms: ↑fluoride * * * noun : a white compound SnF2 of tin and fluorine used in toothpaste to combat tooth decay * * * a white, crystalline powder, SnF2, slightly soluble in water:… …   Useful english dictionary

  • stannous fluoride — a white, crystalline powder, SnF2, slightly soluble in water: used as a source of fluorine in the prevention of dental caries, esp. as a toothpaste additive. Also called tin difluoride, tin fluoride. * * * …   Universalium

  • stannous fluoride — stan′nous fluo′ride n. chem. a white, crystalline powder used in fluoridating toothpaste …   From formal English to slang

  • fluoride — 1. A compound of fluorine with a metal, a nonmetal, or an organic radical. 2. The anion of fluorine; inhibits enolase; found in bone and tooth apatite; f. has a cariostatic …   Medical dictionary

  • Sodium fluoride — IUPAC name Sodium fluoride …   Wikipedia

  • stannousfluoride — stannous fluoride n. A white powder, SnF2, used to fluoridate toothpaste. * * * …   Universalium

  • Tin — is a chemical element with the symbol Sn ( la. stannum) and atomic number 50. This silvery, malleable poor metal that is not easily oxidized in air and resists corrosion, is found in many alloys and is used to coat other metals to prevent… …   Wikipedia

  • tin — tinlike, adj. /tin/, n., adj., v., tinned, tinning. n. 1. Chem. a low melting, malleable, ductile metallic element nearly approaching silver in color and luster: used in plating and in making alloys, tinfoil, and soft solders. Symbol: Sn; at. wt …   Universalium

  • TIN — /tin/, n. taxpayer identification number. * * * Metallic chemical element, chemical symbol Sn, atomic number 50. It is a soft, silvery white metal with a bluish tinge, employed since antiquity in the traditional form of bronze, its alloy with… …   Universalium


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