Thallium(I) hydroxide

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Thallium(I) hydroxide[1]
IUPAC name
thallium(I) hydroxide
Other names
thallous hydroxide
12026-06-1 N
ChemSpider 141413 YesY
Jmol interactive 3D Image
PubChem 160963
Molar mass 221.390 g/mol
Appearance yellow needles
Density 7.44 g/cm3
Melting point decomposes at 139°C
34.3 g/100g at 18°C
88.0 J·mol−1·K−1
-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 YesYN ?)
Infobox references

Thallium(I) hydroxide, also called thallous hydroxide, TlOH, is a hydroxide of thallium, with thallium in oxidation state +1. Thallous hydroxide is a strong base; it is changed to thallous ion, Tl+, except in strongly basic conditions. Tl+ resembles an alkali metal ion, A+, such as Li+ or K+.


  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–89, 5–16. ISBN 0-8493-0594-2.