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209619

Sigma-Aldrich

Potassium carbonate

ACS reagent, ≥99.0%

Linear Formula:
K2CO3
CAS Number:
Molecular Weight:
138.21
Beilstein:
4267587
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

assay

≥99.0%

form

powder or crystals

impurities

≤0.004% S compounds as (SO42-)
≤0.005% silica
≤0.01% insolubles

pH

11-13 (25 °C, 138 g/L)

mp

891 °C (lit.)

anion traces

chloride (Cl-): ≤0.003%
phosphate (PO43-): ≤0.001%

cation traces

Ca: ≤0.005%
Fe: ≤5 ppm
Mg: ≤0.002%
Na: ≤0.02%
heavy metals: ≤5 ppm (by ICP-OES)

SMILES string

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

InChI

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

InChI key

BWHMMNNQKKPAPP-UHFFFAOYSA-L

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General description

Potassium carbonate is an inorganic base.[05] It participates as a base in the palladacycle catalyzed Heck reaction of chlorobenzene with styrene.[02] Addition of amino acids (glycine, sarcosine and proline) to K2CO3 (solvent) promotes the absorption of CO2.[74]

Application

Potassium carbonate has been used in the preparation of disulfonated bis[4-(3-aminophenoxy)phenyl]sulfone, a disulfonated diamine monomer.[41]
It may be used in the following studies:
  • As a reagent in the synthesis of polysubstituted iodobenzene derivatives.
[95]
  • As a base for the synthesis of high molecular weight homopolymers and copolymers derived from various bisphenols.
  • [98]
  • As a base for the Suzuki coupling of aryl halides with aryl boronic acids.
  • [04]
  • The Heck reaction of styrene and bromobenzene.
  • [05]

    Packaging

    100, 500 g in poly bottle
    2.5, 12 kg in poly drum

    Legal Information

    Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

    Pictograms

    Exclamation mark

    Signal Word

    Warning

    Hazard Statements

    Hazard Classifications

    Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

    Target Organs

    Respiratory system

    Storage Class Code

    13 - Non Combustible Solids

    WGK

    WGK 1

    Flash Point(F)

    Not applicable

    Flash Point(C)

    Not applicable

    Certificate of Analysis

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    Certificate of Origin

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