Nomenclature
CAS number: 7775-41-9
Argentous fluoride; silver monofluoride.
AgF; mol wt 126.87.
Ag 85.02%, F 14.97%.
Description and references
Prepared according to the equation Ag2CO3 + 2HF → 2AgF + CO2 + H2O; also
prepd by reduction of AgF2 with H2: Ruff, Die Chemie des Fluors (Berlin, 1920) p 37;
Emeléus in J. H. Simons' Fluorine Chemistry vol. I (Academic Press, New York, 1950) p 32; Kwasnik
in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd
ed., 1963) pp 240-241.
Properties
Flexible leaflets (cubic, NaCl lattice). Very
hygroscopic. Darkens on exposure to light. d 5.852. mp 435°. bp ≈1150°. Soly in water when freshly prepd: 182 g/100 ml at 15.5°.
In moist air it gradually becomes insol because of basic fluoride
formation. Aq solns are neutral and are solvents for silver oxide
which renders them alkaline. Also sol in HF, NH3, CH3CN. Forms several hydrates. The dihydrate is stable to 39.5°
and the tetrahydrate is stable from -14° to +18.7°. In addition,
an acid fluoride, AgF.3HF can be prepd by cooling a soln of AgF in
HF. This loses HF at 0°, forming AgF.HF.Caution
Prolonged absorption may cause mottling
of teeth, skeletal changes.Use
To convert organic Br and Cl compds to their fluoro
analogs; as antiseptic.
Therapeutic Category
Anti-infective.
Keywords
Antiseptic/Disinfectant; Silver compounds