Thallium(I) hydroxide

Thallium(I) hydroxide[1]

Names
IUPAC name

thallium(I) hydroxide

Other names

thallous hydroxide

Identifiers

CAS Number

* 12026-06-1 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 141413 Y

ECHA InfoCard | 100.031.540
EC Number |

* 234-708-8

PubChem CID

* 160963

UNII |

* 847N2ZKW5S Y

CompTox Dashboard (EPA)

* DTXSID10894114

InChI

* InChI=1S/H2O.Tl/h1H2;/q;+1/p-1 Y

Key: QGYXCSSUHCHXHB-UHFFFAOYSA-M Y

* InChI=1/H2O.Tl/h1H2;/q;+1/p-1

Key: QGYXCSSUHCHXHB-REWHXWOFAR

SMILES

* [Tl+].[OH-]

Properties

Chemical formula

| TlOH
Molar mass | 221.390 g/mol
Appearance  | yellow needles
Density | 7.44 g/cm3
Melting point | decomposes at 139°C

Solubility in water

| 34.3 g/100g at 18°C
Hazards
Occupational safety and health (OHS/OSH):

Main hazards

| Very toxic

Corrosive Dangerous for the environment

GHS labelling:[2]

Pictograms

Signal word

| Danger

Hazard statements

| H300, H330, H373, H411

Precautionary statements

| P260, P264, P270, P271, P273, P284, P301+P310, P304+P340, P310, P314, P320, P330, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)  |

COR

Thermochemistry

Std molar
entropy (S⦵298)

| 88.0 J·mol−1·K−1

Std enthalpy of
formation (ΔfH⦵298)

| -238.9 kJ·mol−1

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)

Infobox references

Chemical compound

Thallium(I) hydroxide, also called thallous hydroxide, TlOH, is a hydroxide of thallium, with thallium in oxidation state +1.

## Synthesis[edit]

Thallium(I) hydroxide is obtained from the decomposition of thallium(I) ethoxide in water.[3]

C2H5OTl + H2O → TlOH + C2H5OH

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

4 Tl + 2 C2H5OH + O2 → 2 C2H5OTl + 2 TlOH

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

Tl2SO4 \+ Ba(OH)2 → 2 TlOH + BaSO4

## Properties[edit]

Thallous hydroxide is a strong base; it dissociates to the thallous ion, Tl+, except in strongly basic conditions. Tl+ resembles an alkali metal ion, A+, such as Li+ or K+.

## References[edit]

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.
Find sources: "Thallium(I) hydroxide" – news · newspapers · books · scholar · JSTOR (July 2009) (Learn how and when to remove this template message)

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1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–89, 5–16. ISBN 0-8493-0594-2.
2. ^ "Thallium hydroxide". pubchem.ncbi.nlm.nih.gov. Retrieved 12 December 2021.
3. ^ Brauer, Georg; Baudler, Marianne (1975). Handbuch der Präparativen Anorganischen Chemie, Band I. (3rd ed.). Stuttgart: Ferdinand Enke. p. 883\. ISBN 3-432-02328-6.

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Thallium compounds

Thallium(I)|

* TlN3
* TlOH
* TlI
* TlBr
* Tl2CO3
* TlCl
* TlF
* TlNO3
* Tl2O
* Tl2SO4
* Tl2S
* Tl2Te
* TlI3
* TBCCO

| Organothallium(I)|

* TlC2H3O2
* Tl2C3H2O4
* TlC5H5

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Thallium(III)|

* TlH3
* Tl(OH)3
* Tl2O3
* Tl(NO3)3
* TlF3

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Hydroxides

| H2O |  |  |  | He

|
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|
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LiOH | Be(OH)2 | B(OH)3 | C(OH)4 | NH3.H2O | O(OH)2 | FOH | Ne
NaOH | Mg(OH)2 | Al(OH)3 | Si(OH)4 | P(OH)3 | S(OH)2 | ClOH | Ar
KOH | Ca(OH)2 |  | Sc(OH)3 | Ti(OH)4 | V  | Cr(OH)2
Cr(OH)3 | Mn(OH)2 | Fe(OH)2
Fe(OH)3 | Co(OH)2 | Ni(OH)2 | CuOH
Cu(OH)2 | Zn(OH)2 | Ga(OH)3 | Ge(OH)2 | As(OH)3 | Se  | BrOH | Kr
RbOH | Sr(OH)2 |  | Y  | Zr(OH)4 | Nb  | Mo  | Tc  | Ru  | Rh(OH)3 | Pd  | AgOH | Cd(OH)2 | In(OH)3 | Sn(OH)2
Sn(OH)4 | Sb(OH)3 | Te(OH)6 | IOH | Xe
CsOH | Ba(OH)2 | *  | Lu(OH)3 | Hf  | Ta  | W  | Re  | Os  | Ir  | Pt  | Au(OH)3 | Hg(OH)2 | TlOH
Tl(OH)3 | Pb(OH)2
Pb(OH)4 | Bi(OH)3 | Po  | At  | Rn
FrOH | Ra  | **  | Lr  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og

*  | La(OH)3 | Ce(OH)3
Ce(OH)4 | Pr(OH)3 | Nd(OH)3 | Pm(OH)3 | Sm(OH)3 | Eu(OH)3 | Gd(OH)3 | Tb(OH)3 | Dy(OH)3 | Ho(OH)3 | Er(OH)3 | Tm(OH)3 | Yb(OH)3
**  | Ac(OH)3 | Th(OH)4 | Pa  | UO2(OH)2 | Np  | Pu  | Am(OH)3 | Cm(OH)3 | Bk  | Cf  | Es  | Fm  | Md  | No

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*[CID]: Compound ID
*[EPA]: U.S. Environmental Protection Agency
*[H300]: H300: Fatal if swallowed
*[H330]: H330: Fatal if inhaled
*[H373]: H373: May cause damage to organs through prolonged or repeated exposure
*[H411]: H411: Toxic to aquatic life with long lasting effects
*[P260]: P260: Do not breathe dust/fume/gas/mist/vapours/spray.
*[P264]: P264: Wash ... thoroughly after handling.
*[P270]: P270: Do not eat, drink or smoke when using this product.
*[P271]: P271: Use only outdoors or in a well-ventilated area.
*[P273]: P273: Avoid release to the environment.
*[P284]: P284: Wear respiratory protection.
*[P301+P310]: P301+P310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
*[P304+P340]: P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
*[P310]: P310: Immediately call a POISON CENTER or doctor/physician.
*[P314]: P314: Get Medical advice/attention if you feel unwell.
*[P320]: P320: Specific treatment is urgent (see ... on this label).
*[P330]: P330: Rinse mouth.
*[P391]: P391: Collect spillage.
*[P403+P233]: P403+P233: Store in a well ventilated place. Keep container tightly closed.
*[P405]: P405: Store locked up.
*[P501]: P501: Dispose of contents/container to ...
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