Rubidium hydroxide
Chemical compound
From Wikipedia, the free encyclopedia
Rubidium hydroxide is the inorganic compound with the formula RbOH. It consists of rubidium cations and an equal number of hydroxide anions. It is a colorless solid that is commercially available as aqueous solutions from a few suppliers. Like other strong bases, rubidium hydroxide is highly caustic. Rubidium hydroxide is formed when rubidium metal reacts with water.[3]
| Names | |
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| IUPAC name
Rubidium hydroxide | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.013.806 |
PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| RbOH | |
| Molar mass | 102.475 g·mol−1 |
| Appearance | white solid, hygroscopic |
| Density | 3.1 g/mL at 25 °C |
| Melting point | 382 °C (720 °F; 655 K) dec |
| Boiling point | 1,390 °C (2,530 °F; 1,660 K) |
| 173 g/100 mL (30 °C) | |
| Solubility | soluble in ethanol |
| Acidity (pKa) | 15.4[1] |
| Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
−413.8 kJ/mol |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
Corrosive |
| GHS labelling:[2] | |
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| H302, H312, H314, H332 | |
| P260, P264, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P330, P362+P364, P363, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Related compounds | |
Other cations |
Lithium hydroxide Sodium hydroxide Potassium hydroxide Cesium hydroxide |
Related compounds |
Rubidium oxide (+1) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Uses
Rubidium hydroxide is rarely used in industrial processes because potassium hydroxide and sodium hydroxide can perform nearly all the same functions of rubidium hydroxide. Metal oxide catalysts are sometimes modified with rubidium hydroxide.[3]