Title: Silver Fluoride
CAS Registry Number: 7775-41-9
Additional Names: Argentous fluoride; silver monofluoride
Molecular Formula: AgF
Molecular Weight: 126.87
Percent Composition: Ag 85.02%, F 14.97%
Literature 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.
Melting point: mp 435°
Boiling point: bp ~1150°
Density: d 5.852
CAUTION: Prolonged absorption may cause mottling of teeth, skeletal changes.
Use: To convert organic Br and Cl compds to their fluoro analogs; as antiseptic.
Therap-Cat: Anti-infective.
Keywords: Antiseptic/Disinfectant; Silver compounds. |