Rubidium carbonate

Rubidium carbonate

Rubidium carbonate
CAS number 584-09-8 YesY
PubChem 11431
ChemSpider 10950 YesY
RTECS number FG0650000
Jmol-3D images Image 1
Molecular formula Rb2CO3
Molar mass 230.945 g/mol
Appearance White powder,
very hygroscopic
Melting point

837 °C [1]

Boiling point

900 °C (decomp)

Solubility in water Very soluble
EU Index Not listed
Main hazards Irritant
Flash point Non-flammable
Related compounds
Other cations Lithium carbonate
Sodium carbonate
Potassium carbonate
Caesium carbonate
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Rubidium carbonate, Rb2CO3, is a convenient compound of rubidium; it is stable, not particularly reactive, and readily soluble in water, and is the form in which rubidium is usually sold.


It can be prepared by adding ammonium carbonate to rubidium hydroxide.[2]


It is used in some kinds of glass-making by enhancing stability and durability as well as reducing its conductivity. It is also used as a part of a catalyst for preparing short-chain alcohols from feed gas.[3]