Thallium(I) hydroxide
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+.
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| Names | |
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| IUPAC name
thallium(I) hydroxide | |
| Other names
thallous hydroxide | |
| Identifiers | |
CAS Number |
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.540 |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| 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 | |
| Main hazards | Very toxic (T+)
Corrosive (C) Dangerous for the environment (N) |
EU classification (DSD) (outdated) |
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| NFPA 704 (fire diamond) | ![]()
0
4
1 COR |
| Thermochemistry | |
Std molar entropy (S |
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). | |
| Infobox references | |
References
- 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.
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