SnF2 stannous fluoride

Tin(II) fluoride or stannous fluoride. Its molecular formula is SnF2-... 

In animals, data suggest inorganic tin compounds are not readily absorbed. At 48 hours after oral administration of Sn (a gamma-ray emitting radionuclide), approximately 95% or more of the administered radioactivity was recovered in feces, with 1% or less in urine (Hiles 1974). The various forms of tin ( Sn) compounds administered were stannous pyrophosphate (SnzRO7), stannous fluoride (SnF2), stannic fluoride (SnF ), stannous citrate (Sn[ll]citrate), and stannic citrate (Sn[IV]citrate). The absorption of Sn [II] from the gastrointestinal tract was reported to be 2.85% in rats, while 0.64% of the administered Sn [IV] was absorbed (Hiles 1974). 

Tin (Sn) Tin is a silvery white metal. Solder is an alloy of tin and lead and is used in electrical connections. Stannous fluoride (SnF2) was once a common ingredient in toothpaste, but has largely been replaced by sodium monofluo-rophosphate. 

Stannous Fluoride or Tin Fluoride, SnF2, mw 156.72, wh crysts, mp 210—215° bp— decompd in air to SnOF2 si sol in w slowly hydrolyzes. Can be prepd by the dissolution of stannous oxide in aq HF or by dissolving metallic Sn in anhyd or aq HF (Refs 1 3). Used in toothpaste as fluoride source Refs 1) Gmelin-Kraut Syst Number 46,... 

Stannous fluoride, SnF2, is a white crystalline compound which has its melting point at 219°C and boiling point at 850°C. It is readily soluble in water, aqueous HF and anhydrous HF. 

Fluorides are compounds of fluorine with (usually) one other element. Sodium fluoride (NaF), calcium fluoride (CaF2), and stannous fluoride (SnF2) are examples of fluorides. 

In another example, a,/ -epoxy aldehydes have been coupled with 3-iodo-2[(trimethyl-silyl)methyl]propene in the presence of stannous fluoride (SnF2) <87JA576>. This reaction constitutes a [3 + 3] annulation method and proceeds with good to excellent stereocontrol, and the products can be accessed in chiral, nonracemic form when optically active epoxy aldehydes are employed (Scheme 11). 

Fluorine is used as a fluorinating agent. Many fluorinated organic compounds are stable and nonflammable. They are used as refrigerants, lubricants, plastics (such as Teflon), insecticides, and, until recently, aerosol propellants. Stannous fluoride, SnF2, is used in toothpaste. 

CuCl + 1 cuprous chloride SnF2 +2 stannous fluoride... 

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