Titanic acid

Orthotitanic acid

Names
IUPAC name Orthotitanic acid
Identifiers
CAS Number	20338-08-3  Y
3D model (JSmol)	Interactive image
ChemSpider	15640680  Y
ECHA InfoCard	100.039.752
EC Number	243-744-3
MeSH	titanium+hydroxide
PubChem CID	88494
UNII	W9EOP89V8G  Y
CompTox Dashboard (EPA)	DTXSID30893907
InChI InChI=1S/4H2O.Ti/h4*1H2;/q;;;;+4/p-4 Y Key: LLZRNZOLAXHGLL-UHFFFAOYSA-J Y
SMILES O[Ti](O)(O)O
Properties
Chemical formula	Ti(OH)4
Molar mass	115.90 g/mol
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. ^[1] No crystallographic and little spectroscopic support exists for these materials. Some older literature refers to titanium dioxide (TiO₂) as titanic acid, ^[2] and the dioxide forms an unstable hydrate when TiCl₄ hydrolyzes. ^[3]

• Metatitanic acid (H₂TiO₃), ^[4]
• Orthotitanic acid (H₄TiO₄) ^[5] or Ti(OH)₄. It is described as a white salt-like powder under "TiO₂·2.16H₂O". ^[6]
• Peroxotitanic acid (Ti(OH)₃O₂H) 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. ^[7]
• Pertitanic acid (H₂TiO₄) ^[8]
• Pertitanic acid ([TiO(H₂O₂)]²⁺) ^[9]

References

1. Frederick Pearson Treadwell (1916). Qualitative analysis. J.Wiley & sons, Incorporated. p. 538. Retrieved 26 March 2021.
2. C. Remigius Fresenius (1887). Qualitative Chemical Analysis. J. & A. Churchill. pp.  115–116.
3. Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 421.
4. 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.
5. Leonard Dobbin, Hugh Marshall (1904). Salts and their reactions: A class-book of practical chemistry. University of Edinburgh.
6. Ehrlich, P. (1963). "Titanium(IV) Oxide Hydrate TiO₂·nH₂O". In Brauer, G. (ed.). Handbook of Preparative Inorganic Chemistry. Vol. 1 (2nd ed.). New York: Academic Press. p. 1218.
7. Ehrlich, P. (1963). "Peroxotitanic Acid H₄TiO₅". In Brauer, G. (ed.). Handbook of Preparative Inorganic Chemistry. Vol. 1 (2nd ed.). New York: Academic Press. p. 1219.
8. Liu, Caiyun; Gao, Chang; Said, Amir; Niu, Huihui; Wang, Dexin; Tung, Chen-Ho; Wang, Yifeng (2021-10-04). "Assembly of Interlocked Superstructures with a Titanium Oxide Molecular Ring in Water" . Inorganic Chemistry. 60 (19): 14520–14524. doi:10.1021/acs.inorgchem.1c01874. ISSN   0020-1669.
9. 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. S2CID   92389986.

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 (1–3): 67–72. doi:10.1023/B:JSST.0000047962.82603.d9. S2CID   98144172.