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243558

Sigma-Aldrich

Potassium carbonate sesquihydrate

ACS reagent, 99%

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About This Item

Linear Formula:
K2CO3 · 1.5H2O
CAS Number:
Molecular Weight:
165.23
EC Number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

assay

98.5-101.0% (ACS specification)
99%

form

crystals or granules
(Powder or Crystals or Granules or Chunks)

impurities

≤0.001% N compounds
≤0.004% S compounds (as SO42-)
≤0.005% silica
≤0.01% NH4OH pptd.
≤0.01% insolubles

loss

14.0-16.5% loss on heating

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

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

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General description

Crystals of potassium carbonate sesquihydrate belong to the monoclinic crystal system and space group C2/c.

Application

Potassium carbonate sesquihydrate can be used as a sorbent for the removal of CO2 from flue gas in precombustion process. It may be employed as a base in the cross-coupling of benzene boronic acid with benzoyl chloride in the presence of deposited Pd catalysts to give benzophenone.

It may also be used as one of the reaction components in the preparation of:
  • 1,2,3-triethylimidazolium
  • 1,2,3-triethyl-4-methylimidazolium
  • 2-ethyl-1,3,4-trimethylimidazolium

pictograms

Exclamation mark

signalword

Warning

Hazard Classifications

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

target_organs

Respiratory system

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Synthesis, structure, and optical activity of HPM-1, a pure silica chiral zeolite.
Rojas A, et al.
Journal of the American Chemical Society, 135(32), 11975-11984 (2013)
Synthesis of aromatic ketones by Suzuki-Miyaura cross-coupling of acyl chlorides with boronic acids mediated by palladium catalysts deposited over donor-functionalized silica gel.
Semler M and Stepnicka P.
Catalysis Today, 243, 128-133 (2015)
Ab initio thermodynamic study of the CO2 capture properties of potassium carbonate sesquihydrate, K2CO3? 1.5H2O.
Duan Y, et al.
The Journal of Physical Chemistry C, 116(27), 14461-14470 (2012)
Study of the performance of imidazolium-derived cations as structure directing agents in the synthesis of zeolites in fluoride media.
Variani YM, et al.
New. J. Chem., 40(9), 7968-7977 (2016)

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