Titanic acid

Titanic acid

Identifiers
CAS Number	20338-08-3
3D model (Jmol)	Interactive image
ChemSpider	15640680
ECHA InfoCard	100.039.752
EC Number	243-744-3
MeSH	titanium+hydroxide
PubChem	88494
InChI InChI=1S/4H2O.Ti/h4*1H2;/q;;;;+4/p-4 Key: LLZRNZOLAXHGLL-UHFFFAOYSA-J
SMILES O[Ti](O)(O)O
Properties
Chemical formula	TiH 4O 4
Molar mass	115.896 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

Titanic acid is a general name for a family of chemical compounds of the elements titanium, hydrogen, and oxygen, with the general formula [TiO_x(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
  2TiO
  3),^[2]
• Orthotitanic acid (H
  4TiO
  4).^[3] It is described as a white salt-like powder under "TiO₃·2.16H₂O."^[4]
• Peroxotitanic acid (Ti(OH)
  3O
  2H) 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]

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. 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. Handbook of Preparative Inorganic Chemistry. 1 (2nd ed.). New York: Academic Press. p. 1218.
5. Ehrlich, P. (1963). "Peroxotitanic Acid H₄TiO₅". In Brauer, G. Handbook of Preparative Inorganic Chemistry. 1 (2nd ed.). New York: Academic Press. p. 1219.

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. doi:10.1023/B:JSST.0000047962.82603.d9.