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12887 534-17-8 Cesium carbonate, 99% (metals basis) Alfa Aesar


Certificate of Analysis

Cesium carbonate, 99% (metals basis)

CAS: 534-17-8 MDL: MFCD00010957  EINECS: 208-591-9
Not regulated for shipping


Pricing and Availability

Size ($) Price Your Price Quantity Options Availability
5g 13.70 Check Availability Add to Favorites Enter qty and click checkbox
50g 41.30 Check Availability Add to Favorites Enter qty and click checkbox
250g 137.00 Check Availability Add to Favorites Enter qty and click checkbox
1kg 449.00 Check Availability Add to Favorites Enter qty and click checkbox

Chemical Properties

Formula: Cs2CO3  Density: 4.072
Formula weight: 325.82  Sensitivity: Hygroscopic
Form: Powder/Granules Solubility: Very soluble in water and alcohol. Soluble in ether
Melting point: 610° dec. 

Literature References

Can be used to prepare Cs salts of N-protected amino acids or peptides, which can then be cleanly esterified by treatment with an alkyl halide in DMF: Helv. Chim. Acta, 56, 1476 (1973); J. Org. Chem., 42, 1286 (1977). Carboxylic acids can be esterified in high yield with an alkyl halide and Cs2CO3 at ambient temperature in DMF: Synth. Commun., 30, 2687 (2000). Benzoic acids can be esterified by refluxing with an alcohol in acetonitrile: Org. Prep. Proced. Int., 28, 480 (1996).

The di-Cs salts of catechol and resorcinol are superior to other alkali metal salts in the reaction with dibromoethers in DMF to give crown ethers: J. Chem. Soc., Chem. Commun., 285 (1979). Also used in the facile synthesis of alkyl phenyl ethers from phenols and alkyl halides in acetonitrile: Synth. Commun., 25, 1367 (1995), and catalytically in the O-methylation of phenols by heating in excess dimethyl carbonate: Synlett, 1063 (1998); K2CO3 was found to be less effective. Indoles undergo N-alkylation in DMPU: Synlett, 2394 (2004).

For use in formation of macrocyclic sulfides from dithiols and dibromoalkanes, see: J. Org. Chem., 46, 4481 (1981); Org. Synth. Coll., 8, 592 (1993). Salts of other metals are ineffective.

For a review of the 'cesium ion effect' and macrocyclization, see: Org. Prep. Proced. Int., 24, 285 (1992).

Superior base for Horner-Wadsworth-Emmons olefination reaction of phosphonates: Chem. Lett., 335 (1989); Bull. Soc. Chim. Belg., 100, 267 (1991).

For cleavage of 2-oxazolidinones to give amino alcohols, see: Tetrahedron Lett., 28, 4185 (1987).

For a brief feature on uses of the reagent in synthesis, see: Synlett, 2447 (2004).


Catalyst in ethylene oxide polymerization, in coating spatter-free welding of steel in CO2, and in oxide cathodes

Other References

Merck: 14,2010
Beilstein: 4546405
Harmonized Tariff Code: 2836.99

GHS Hazard and Precautionary Statements

Hazard Statements : H315-H319-H335-H303

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. May be harmful if swallowed.

Precautionary Statements : P261-P280-P305+P351+P338-P304+P340-P405-P501A

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Harmful or Irritant

Risk & Safety

Risk Phrases: 36/37/38
Irritating to eyes, respiratory system and skin.
Safety Phrases: 26-37-60
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves. This material and/or its container must be disposed of as hazardous waste.
RTECS: FK9400000