titanic acid

{{Chembox

| Name = Orthotitanic acid

| ImageFile = Orthotitanic-acid-3D-vdW.png

| OtherNames =

| IUPACName = Orthotitanic acid

| SystematicName =

| Section1 = {{Chembox Identifiers

| CASNo = 20338-08-3

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = W9EOP89V8G

| PubChem = 88494

| ChemSpiderID = 15640680

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| EINECS = 243-744-3

| MeSHName = titanium+hydroxide

| SMILES = O[Ti](O)(O)O

| StdInChI = 1S/4H2O.Ti/h4*1H2;/q;;;;+4/p-4

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = LLZRNZOLAXHGLL-UHFFFAOYSA-J

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

}}

| Section2 = {{Chembox Properties

| Formula = {{Chem2|Ti(OH)4}}

| MolarMass = 115.90 g/mol

| Appearance = White crystals

| Solubility =

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Titanic acid is a general name for a family of chemical compounds of the elements titanium, hydrogen, and oxygen, with the general formula {{chem2|[TiO_{x}(OH)_{4−2x}]_{n}|}}. Various simple titanic acids have been claimed, mainly in the older literature.{{cite book |author1=Frederick Pearson Treadwell |title=Qualitative analysis |date=1916 |publisher=J.Wiley & sons, Incorporated |pages=538 |url=https://books.google.com/books?id=svIZAAAAYAAJ |access-date=26 March 2021 |language=English}} No crystallographic and little spectroscopic support exists for these materials. Some older literature refers to titanium dioxide ({{chem2|TiO2}}) as titanic acid,{{cite book|author=C. Remigius Fresenius|title=Qualitative Chemical Analysis|url=https://archive.org/details/qualitativechem00grovgoog|year=1887|publisher=J. & A. Churchill|pages=[https://archive.org/details/qualitativechem00grovgoog/page/n141 115]–116}} and the dioxide forms an unstable hydrate when TiCl₄ hydrolyzes.Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 421.

• Metatitanic acid ({{Chem2|H2TiO3}}),{{cite journal |journal=Journal of the American Chemical Society |volume=13 |issue=7 |pages=210–211 |author=F.P. Dunnington |title=On metatitanic acid and the estimation of titanium by hydrogen peroxide |year=1891 |doi=10.1021/ja02124a032 |url=https://zenodo.org/record/1428963 }}
• Orthotitanic acid ({{Chem2|H4TiO4}}){{cite book |title=Salts and their reactions: A class-book of practical chemistry |author= Leonard Dobbin, Hugh Marshall |publisher=University of Edinburgh | year=1904 |url=https://books.google.com/books?id=WCBIAAAAIAAJ&q=review+orthotitanic+acid&pg=PA172}} or {{chem2|Ti(OH)4}}. It is described as a white salt-like powder under "{{chem2|TiO2*2.16H2O}}".{{cite book|first=P. |last=Ehrlich |chapter=Titanium(IV) Oxide Hydrate TiO₂·nH₂O |title= Handbook of Preparative Inorganic Chemistry |edition=2nd |editor-first=G. |editor-last=Brauer |publisher=Academic Press |date=1963 |location=New York |volume= 1 |page= 1218}}
• Peroxotitanic acid ({{Chem2|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 {{chem2|O2}}.{{cite book|first=P. |last=Ehrlich |chapter=Peroxotitanic Acid H₄TiO₅|title= Handbook of Preparative Inorganic Chemistry |edition=2nd |editor-first=G. |editor-last=Brauer |publisher=Academic Press |date=1963 |location=New York |volume= 1 |page= 1219}}
• Pertitanic acid ({{chem2|H2TiO4}}){{Cite journal |last=Liu |first=Caiyun |last2=Gao |first2=Chang |last3=Said |first3=Amir |last4=Niu |first4=Huihui |last5=Wang |first5=Dexin |last6=Tung |first6=Chen-Ho |last7=Wang |first7=Yifeng |date=2021-10-04 |title=Assembly of Interlocked Superstructures with a Titanium Oxide Molecular Ring in Water |url=https://pubs.acs.org/doi/10.1021/acs.inorgchem.1c01874 |journal=Inorganic Chemistry |language=en |volume=60 |issue=19 |pages=14520–14524 |doi=10.1021/acs.inorgchem.1c01874 |issn=0020-1669}}
• Pertitanic acid ({{chem2|[TiO(H2O2)](2+)}}){{cite journal |journal= Fresenius' Journal of Analytical Chemistry |year= 1967 |volume= 229 |issue= 6 |pages= 413–433 |title= Analysis using fluotitanic acid-hydrogen peroxide reagent: A review |first= Hisao |last= Fukamauchi |doi= 10.1007/BF00505508 |s2cid= 92389986 }}