Title: Chromic Fluoride
CAS Registry Number: 7788-97-8
Molecular Formula: CrF3
Molecular Weight: 108.99
Percent Composition: Cr 47.71%, F 52.29%
Literature References: Prepd by heating CrCl3 in a current of HF: Kwasnik in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p. 257. Review of chromium halides: Fergusson in Halogen Chemistry vol. 3, V. Gutmann, Ed. (Academic Press, New York, 1967) pp 227-302.
Properties: Dark green needles, d 3.8. mp 1100°. Sublimes at 1100-1200°. Practically insol in water, alcohol. Sol in HCl with violet color.
Melting point: mp 1100°
Density: d 3.8
Derivative Type: Trihydrate
Additional Names: Triaquochromium trifluoride
Literature References: Discussion of other hydrates or Werner complexes: ACS Monograph Series no. 132, entitled "Chromium," vol. 1, M. J. Udy, Ed. (Reinhold, New York, 1956) p 183.
Properties: Green crystals from solns of Cr or Cr(OH)3 in hydrofluoric acid. Sparingly sol in water.
Use: The hydrates in printing and dyeing woolens; coloring and hardening marble; mothproofing woolen fabrics; treating silk; polishing metals; halogenation catalyst. |