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Saving copy of the {{chembox}} taken from revid 467663456 of page Thallium(I)_hydroxide for the Chem/Drugbox validation project (updated: 'CASNo').
 
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{{ambox | text = This page contains a copy of the infobox ({{tl|chembox}}) taken from revid [{{fullurl:Thallium(I)_hydroxide|oldid=467663456}} 467663456] of page [[Thallium(I)_hydroxide]] with values updated to verified values.}}
{{Chembox
{{Chembox
| Verifiedfields = changed
| verifiedrevid = 447133916
| verifiedrevid = 470605538
| ImageFile =
| ImageSize =
| ImageFile = TlOH.png
| ImageSize = 250
| Reference = <ref name="hand">
| Reference = <ref name="hand">
{{cite book | last = Lide | first = David R. | year = 1998
{{cite book | last = Lide | first = David R. | year = 1998 | title = Handbook of Chemistry and Physics | edition = 87 | volume =
⚫
| location = Boca Raton, Florida | publisher = CRC Press | isbn = 0-8493-0594-2 | pages = 4–89, 5–16}}</ref>
| title = Handbook of Chemistry and Physics
| edition = 87 | volume =
| location = Boca Raton, FL
| publisher = CRC Press
⚫
| isbn = 0-8493-0594-2 | pages = 4–89, 5–16}}</ref>
| IUPACName = thallium(I) hydroxide
| IUPACName = thallium(I) hydroxide
| OtherNames = thallous hydroxide
| OtherNames = thallous hydroxide
| Section1 = {{Chembox Identifiers
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 141413
| ChemSpiderID = 141413
| EINECS = 234-708-8
| InChI = 1/H2O.Tl/h1H2;/q;+1/p-1
| InChI = 1/H2O.Tl/h1H2;/q;+1/p-1
| InChIKey = QGYXCSSUHCHXHB-REWHXWOFAR
| InChIKey = QGYXCSSUHCHXHB-REWHXWOFAR
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = QGYXCSSUHCHXHB-UHFFFAOYSA-M
| StdInChIKey = QGYXCSSUHCHXHB-UHFFFAOYSA-M
| CASNo_Ref = {{cascite|correct|??}}
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = <!-- blanked - oldvalue: 12026-06-1 -->
| CASNo = 12026-06-1
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 847N2ZKW5S
| PubChem = 160963
| PubChem = 160963
| SMILES = [Tl+].[OH-]
| SMILES = [Tl+].[OH-]
}}
}}
| Section2 = {{Chembox Properties
|Section2={{Chembox Properties
| Formula = TlOH
| Formula = TlOH
| Tl=1|O=1|H=1
| MolarMass = 221.390 g/mol
| Appearance = yellow needles
| Appearance = yellow needles
| Density = 7.44 g/cm<sup>3</sup>
| Density = 7.44 g/cm<sup>3</sup>
| MeltingPt = decomposes at 139°C
| MeltingPt = decomposes at 139°C
| BoilingPt =
| BoilingPt =
| Solubility = 34.3 g/100g at 18°C}}
| Solubility = 34.3 g/(100 g) at 18°C}}
| Section3 = {{Chembox Hazards
|Section4={{Chembox Thermochemistry
⚫
| DeltaHf = −238.9 kJ/mol
⚫
| MainHazards =
| FlashPt =
| DeltaHc =
⚫
| Entropy = 88.0 J/(mol·K)
| Autoignition = }}
| Section4 = {{Chembox Thermochemistry
⚫
| DeltaHf = -238.9 kJ·mol<sup>-1</sup>
| DeltaHc =
⚫
| Entropy = 88.0 J·mol<sup>-1</sup>·K<sup>-1</sup>
| HeatCapacity = }}
| HeatCapacity = }}
|Section7={{Chembox Hazards
⚫
| MainHazards = Very toxic
Corrosive
Dangerous for the environment
| NFPA-H = 4
| NFPA-F = 0
| NFPA-R = 1
| NFPA-S = COR
| GHS_ref=<ref>{{cite web |title=Thallium hydroxide |url=https://pubchem.ncbi.nlm.nih.gov/compound/160963#section=Safety-and-Hazards |website=pubchem.ncbi.nlm.nih.gov |access-date=12 December 2021 |language=en}}</ref>
| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|300|330|373|411}}
| PPhrases = {{P-phrases|260|264|270|271|273|284|301+310|304+340|310|314|320|330|391|403+233|405|501}}
}}
}}
}}
'''Thallium(I) hydroxide''', also called '''thallous hydroxide''', is a [[chemical compound]] with the [[chemical formula]] {{chem2|TlOH|auto=1}}. It is a [[hydroxide]] of [[thallium]], with thallium in [[oxidation state]] +1. It is a thallium(I) [[Salt (chemistry)|salt]] of [[water]]. It consists of thallium(I) [[cations]] {{chem2|Tl+}} and [[hydroxide]] [[anions]] {{chem2|OH−}}.

== Synthesis ==
Thallium(I) hydroxide is obtained from the decomposition of [[thallium(I) ethoxide]] in water.<ref>{{Cite book|last=Brauer|first=Georg|title=Handbuch der Präparativen Anorganischen Chemie, Band I.|last2=Baudler|first2=Marianne|publisher=Ferdinand Enke|year=1975|isbn=3-432-02328-6|edition=3rd|location=Stuttgart|pages=883}}</ref>

:{{chem2|CH3CH2OTl + H2O → TlOH + [[ethanol|CH3CH2OH]]}}

This can also be done by direct reaction of thallium with [[ethanol]] and [[oxygen]] gas.

:{{chem2|4 Tl + 2 CH3CH2OH + O2 → 2 CH3CH2OTl + 2 TlOH}}

Another method is the reaction between [[thallium(I) sulfate]] and [[barium hydroxide]].

:{{chem2|Tl2SO4 + Ba(OH)2 → 2 TlOH + [[Barium sulfate|BaSO4]]}}

== Properties ==
Thallium(I) hydroxide is a strong [[Base (chemistry)|base]]; it [[Dissociation (chemistry)|dissociates]] to [[thallium]](I) [[cations]], {{chem2|Tl+}}, and [[hydroxide]] [[anions]], {{chem2|OH−}}, except in strongly [[Base (chemistry)|basic conditions]]. {{chem2|Tl+}} cation resembles an [[alkali metal]] cation, such as {{chem2|[[Lithium|Li]]+}}, {{chem2|[[Sodium|Na]]+}} or {{chem2|[[Potassium|K]]+}}.

==References==
{{More citations needed|date=July 2009}}
{{reflist}}

{{Thallium compounds}}
{{Hydroxides}}

[[Category:Hydroxides]]
[[Category:Thallium(I) compounds]]
{{inorganic-compound-stub}}
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