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223484

Sigma-Aldrich

Sodium carbonate

ACS reagent (primary standard), anhydrous, 99.95-100.05% dry basis

Synonym(s):
Calcined soda, Carbonic acid disodium salt, Soda ash
Linear Formula:
Na2CO3
CAS Number:
Molecular Weight:
105.99
Beilstein:
4154566
EC Number:
MDL number:
eCl@ss:
38020205
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent (primary standard)
anhydrous

Quality Level

assay

99.95-100.05% dry basis

form

powder

impurities

≤0.005% silica
≤0.01% insolubles

loss

≤1.0% loss on heating

pH

12 (25 °C, 106 g/L)

mp

851 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
phosphate (PO43-): ≤0.001%
sulfur compounds (as SO42-): ≤0.003%

cation traces

Ca: ≤0.02%
Fe: ≤5 ppm
K: ≤0.005%
Mg: ≤0.004%
heavy metals: ≤5 ppm (by ICP-OES)

SMILES string

O=C(O[Na])O[Na]

InChI

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

InChI key

CDBYLPFSWZWCQE-UHFFFAOYSA-L

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General description

Sodium carbonate (Soda) is a white salt. It can be synthesized by the electrolysis of the molten sodium hydroxide or sodium chloride.[25]
Sodium carbonate is a water soluble weak base.[36] Its aqueous solution has the ability to uptake carbon dioxide.[37] It can also catalyze the conversion of sewage sludge to liquid fuels.[38]

Application

Sodium carbonate may be used as a reducing agent for the preparation of graphene sheets with good electrocapacity from graphene oxide dispersion.[39]
It may also be used in procedures for the synthesis of the following:
  • Biaryls via palladium-catalyzed cross-coupling reaction of phenylboronicacid with haloarenes.
[73]
  • Chalcones and azachalcones via aldol condensation of aldehydes with ketones in aqueous medium.
  • [41]
  • Enynes via copper-catalyzed allylation of functionalized alkynes.
  • [36]
    Sodium carbonate may be used in the following studies:
    • Determination of total polyphenolic index of wine products from grape by the Folin-Ciocalteu method.
    [63]
  • To compose the ELISA (Enzyme-Linked Immunosorbent Assay) coating buffer.
  • [64]
  • Preparation of the antibody coating buffer for use in IGF-I kinase receptor activation assay (KIRA) assay.
  • [65]

    Packaging

    500, 6×500 g in poly bottle

    Biochem/physiol Actions

    Buffer component, may be used for the removal of peripheral membrane proteins.

    Pictograms

    Exclamation mark

    Signal Word

    Warning

    Hazard Statements

    Hazard Classifications

    Eye Irrit. 2

    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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