Titanic acid

Titanic acid is a general name for a family of chemical compounds of the elements titanium, hydrogen, and oxygen, with the general formula [TiOx(OH)4−2x]n. Various simple titanic acids have been claimed, mainly in the older literature. No crystallographic and little spectroscopic support exists for these materials. Some older literature including Brauer's Handbook refers to TiO2 as titanic acid.[1]

  • Metatitanic acid (H
    2    TiO
    3    ),[2]
  • Orthotitanic acid (H
    4    TiO
    4    ).[3] It is described as a white salt-like powder under "TiO2·2.16H2O."[4]
  • Peroxotitanic acid (Ti(OH)
    3    O
    2    H    ) has also been described as resulting from the treatment of titanium dioxide in sulfuric acid with hydrogen peroxide. The resulting yellow solid decomposes with loss of O2.[5]
  • Pertitanic acid (H2TiO4)
  • Pertitanic acid (TiO(H2O2)2+)[6]
Titanic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.039.752
EC Number
  • 243-744-3
MeSH titanium+hydroxide
UNII
Properties
TiH
4O
4
Molar mass 115.90 g·mol−1
Appearance White crystals
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

References
  1. C. Remigius Fresenius (1887). Qualitative Chemical Analysis. J. & A. Churchill. pp. 115–116.
  2. F.P. Dunnington (1891). "On metatitanic acid and the estimation of titanium by hydrogen peroxide". Journal of the American Chemical Society. 13 (7): 210–211. doi:10.1021/ja02124a032.
  3. Leonard Dobbin, Hugh Marshall (1904). Salts and their reactions: A class-book of practical chemistry. University of Edinburgh.
  4. Ehrlich, P. (1963). "Titanium(IV) Oxide Hydrate TiO2·nH2O". In Brauer, G. (ed.). Handbook of Preparative Inorganic Chemistry. 1 (2nd ed.). New York: Academic Press. p. 1218.
  5. Ehrlich, P. (1963). "Peroxotitanic Acid H4TiO5". In Brauer, G. (ed.). Handbook of Preparative Inorganic Chemistry. 1 (2nd ed.). New York: Academic Press. p. 1219.
  6. Fukamauchi, Hisao (1967). "Analysis using fluotitanic acid-hydrogen peroxide reagent: A review". Fresenius' Journal of Analytical Chemistry. 229 (6): 413–433. doi:10.1007/BF00505508.

Further reading
  • C.K. Lee; et al. (2004). "Preparation and Characterization of Peroxo Titanic Acid Solution Using TiCl3". Journal of Sol-Gel Science and Technology. 31: 67–72. doi:10.1023/B:JSST.0000047962.82603.d9.
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