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

EC Number |

* 234-708-8

PubChem CID

* 160963

UNII |

* 847N2ZKW5S Y

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 | 221.39 g·mol−1
Appearance  | yellow needles
Density | 7.44 g/cm3
Melting point | decomposes at 139°C

Solubility in water

| 34.3 g/(100 g) at 18°C
Thermochemistry

Std molar
entropy (S ~~o~~ 298)

| 88.0 J·mol−1·K−1

Std enthalpy of
formation (ΔfH⦵298)

| −238.9 kJ·mol−1
Hazards
Main hazards | Very toxic

Corrosive Dangerous for the environment

GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H300, H330, H373, H411

GHS precautionary statements

| P260, P264, P270, P271, P273, P284, P301+310, P304+340, P310, P314, P320, P330, P391, P403+233, P405, P501
NFPA 704 (fire diamond)  |

COR

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

Tracking categories (test):

* SizeSet

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

## Synthesis

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

3CH
2OTl + H
2O → TlOH + CH
3CH
2OH

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

4 Tl + 2 CH
3CH
2OH + O
2 → 2 CH
3CH
2OTl + 2 TlOH

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

2SO
4 \+ Ba(OH)
2 → 2 TlOH + BaSO

## Properties

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

## References

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" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/160963#section=Safety-and-Hazards.
3. ↑ Brauer, Georg; Baudler, Marianne (1975). Handbuch der Präparativen Anorganischen Chemie, Band I. (3rd ed.). Stuttgart: Ferdinand Enke. pp. 883. ISBN 3-432-02328-6.

* v
* t
* e

Thallium compounds

Thallium(I)|

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

| Organothallium(I)|

* Tl(C2H3O2)3
* Tl2C3H2O4
* TlC5H5

|

Thallium(III)|

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

* v
* t
* e

Hydroxides

| H2O |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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LiOH | Be(OH)2 |  |  |  |  |  |  |  |  |  |  | B | C | NH3.H2O | O | F | Ne
NaOH | Mg(OH)2 |  |  |  |  |  |  |  |  |  |  | Al(OH)3 | Si | P | S | Cl | HArF (ArHF)
KOH | Ca(OH)2 | Sc(OH)3 | Ti | 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 | Se | Br | Kr
RbOH | Sr(OH)2 | Y(OH)3 | Zr(OH)4 | Nb | Mo | Tc | Ru | Rh | Pd | AgOH | Cd(OH)2 | In(OH)3 | Sn(OH)2
Sn(OH)4 | Sb(OH)3 | Te | I | Xe
CsOH | Ba(OH)2 | *  | 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
Fr | Ra | **  | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |  |  |  |  |  |  |  |
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | La(OH)3 | Ce(OH)3 | 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 | Lu(OH)3 |
| ** | Ac | Th(OH)4 | Pa | UO2(OH)2 | Np | Pu | Am | Cm(OH)3 | Bk | Cf | Es | Fm | Md | No | Lr |

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*[CID]: Compound ID
*[H300]: Fatal if swallowed
*[H330]: Fatal if inhaled
*[H373]: May cause damage to organs through prolonged or repeated exposure
*[H411]: Toxic to aquatic life with long lasting effects
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*[P264]: Wash … thoroughly after handling
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*[P284]: Wear respiratory protection
*[P301+310]: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
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*[P320]: Specific treatment is urgent (see … on this label)
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