Caesium bicarbonate

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| ImageFile = Cesium bicarbonate.svg

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| IUPACName = Caesium hydrogencarbonate

| OtherNames = {{Unbulleted list|Cesium hydrogencarbonate|Cesium bicarbonate}}

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| Section1 = {{Chembox Identifiers

| CASNo = 15519-28-5

| PubChem = 2724157

| ChemSpiderID = 2006316

| SMILES = [Cs+].[O-]C(=O)O

| InChI = 1/CH2O3.Cs/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1

| InChIKey = ZMCUDHNSHCRDBT-REWHXWOFAQ

| StdInChI = 1S/CH2O3.Cs/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1

| StdInChIKey = ZMCUDHNSHCRDBT-UHFFFAOYSA-M

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| Section2 = {{Chembox Properties

| Formula = CsHCO₃

| MolarMass = 193.922 g/mol

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| Solubility = 67.77 g/100 mL at 20°C

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| Section3 = {{Chembox Hazards

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Caesium bicarbonate or cesium bicarbonate is a chemical compound with the chemical formula CsHCO₃. It can be produced through the following reaction:

:Cs₂CO₃ + CO₂ + H₂O → 2 CsHCO₃

The compound can be used for synthesizing caesium salts, but less common than caesium carbonate.