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20959

Sigma-Aldrich

Cesium carbonate

puriss. p.a., ≥99.0%

Synonym(s):

Carbonic acid dicesium

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About This Item

Linear Formula:
Cs2CO3
CAS Number:
534-17-8
Molecular Weight:
325.82
Beilstein:
4546405
EC Number:
208-591-9
MDL number:
MFCD00010957
UNSPSC Code:
12352301
PubChem Substance ID:
329752061
NACRES:
NA.22

grade

puriss. p.a.

Quality Level

100

Assay

≥99.0% (T)
≥99.0%

impurities

≤0.002% total nitrogen (N)

mp

610 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤20 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

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

InChI

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

InChI key

FJDQFPXHSGXQBY-UHFFFAOYSA-L

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General description

Cesium carbonate is an inorganic base generally used in C, N, O-arylation and alkylation reactions. It is also used in six-membered annulation, cross-coupling, intramolecular and intermolecular cyclizations, aza-Henry reaction, Horner-Emmons cyclization, and cycloaddition reactions.

Application

Cesium carbonate, an alkali metal carbonate, is a commonly used inorganic base in organic reactions.
Synthetic applications:
  • As a catalyst to synthesize quinazoline-2,4(1H,3H)-diones from substituted 2-aminobenzonitriles and carbon dioxide.
  • As a base to synthesize cyclic carbonates using halo- or tosyl-alcohols and carbon dioxide in the absence of any transition metal or organo catalyst.
  • In combination with alkyl halide and acetonitrile, it forms an effective system for the alkylation method of phenols.

Promotes the efficient O-alkylation of alcohols to form mixed alkyl carbonates.

Pictograms

Health hazardCorrosion
GHS08,GHS05

Signal Word

Danger

Hazard Statements

H318,H361f,H373

Hazard Classifications

Eye Dam. 1 - Repr. 2 - STOT RE 2 Oral

Target Organs

Kidney,Adrenal gland,Testes

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

20959-VAR:
20959-250G:
20959-50G:
20959-BULK:
20959-10G:

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Certificates of Analysis (COA)

Lot/Batch Number
BCCG8981
BCCF8984
BCCG0549
BCCF7477
BCCF0257

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Cesium carbonate catalyzed efficient synthesis of quinazoline-2, 4 (1 H, 3 H)-diones using carbon dioxide and 2-aminobenzonitriles.
Patil Y P, et al.
Green Chemistry Letters and Reviews, 1(2), 127-132 (2008)
Synthesis of cyclic carbonates with carbon dioxide and cesium carbonate.
Reithofer M R, et al.
Green Chemistry, 15(8), 2086-2090 (2013)
Facile synthesis of alkyl phenyl ethers using cesium carbonate.
Lee J C, et al.
Synthetic Communications, 25(9), 1367-1370 (1995)
Cesium carbonate: a powerful inorganic base in organic synthesis.
Flessner T and Doye S.
J. Prakt. Chem., 341(2), 186-190 (1999)
Richard C Burrell et al.
Journal of labelled compounds & radiopharmaceuticals, 57(10), 600-605 (2014-09-10)
Bristol-Myers Squibb and others are developing drugs that target novel mechanisms to combat Alzheimer's disease. γ-Secretase inhibitors are one class of potential therapies that have received considerable attention. (R)-2-(4-Chloro-N-(2-fluoro-4-(1,2,4-oxadiazol-3-yl)benzyl)phenylsulfonamido)-5,5,5-trifluoropentanamide (Avagacestat) is a γ-secretase-inhibiting drug that has been investigated by Bristol-Myers
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