Caesium carbonate

Caesium carbonate
IUPAC name	Caesium carbonate
Other names	Cesium carbonate
Identifiers
CAS number	[534-17-8]
Properties
Chemical formula	Cs2CO3
Molar mass	325.82 g/mol
Appearance	white powder
Density	4.072 g/cm3
Melting point	610 °C decomp.
Solubility in water	260.5 g/100 mL (15 °C)
Hazards
EU index number	Not listed
Flash point	Non-flammable
Related compounds
Other cations	Lithium carbonate Sodium carbonate Potassium carbonate Rubidium carbonate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium carbonate (or cesium carbonate in the US) is a white crystalline solid of formula Cs₂CO₃. It is more soluble in organic solvents than many other carbonates such as potassium carbonate, and therefore finds use as a base in organic chemistry.

Characteristic of carbonate salts, it reacts with protic acids to give carbon dioxide gas, water, and a caesium salt as follows:

Cs₂CO₃ + 2HCl -> 2CsCl + H₂O + CO₂