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S0505

Sigma-Aldrich

Sodium sulfite

≥98%

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Linear Formula:
Na2SO3
CAS Number:
Molecular Weight:
126.04
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.55

agency

suitable for SM 5210

Quality Level

assay

≥98%

form

powder or crystals

pH

9.0-10.5 (25 °C, 126 g/L)

SMILES string

[Na+].[Na+].[O-]S([O-])=O

InChI

1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2

InChI key

GEHJYWRUCIMESM-UHFFFAOYSA-L

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This Item
239321S467271988
Sodium sulfite ≥98%

S0505

Sodium sulfite

-
Sodium sulfite ACS reagent, ≥98.0%

239321

Sodium sulfite

Essential Grade
Sodium sulfite BioXtra, ≥98%

S4672

Sodium sulfite

Premium Grade
Sodium sulfite BioUltra, anhydrous, ≥98% (RT)

71988

Sodium sulfite

Premium Grade
assay

≥98%

assay

≥98.0%

assay

≥98%

assay

≥98% (RT)

pH

9.0-10.5 (25 °C, 126 g/L)

pH

9.0-10.5 (25 °C, 126 g/L)

pH

-

pH

9.0-10.5 (25 °C, 1 M in H2O)

agency

suitable for SM 5210

agency

suitable for SM 5210

agency

-

agency

-

General description

Sodium sulfite is a water-soluble inorganic salt that is commonly used as a reagent for sulfonation and sulfomethylation reactions. Additionally, it is also used as a bleaching, de-sulfurizing, and dechlorinating agent.

Application

Sodium sulfite can be used as:      
  • A source of sulfur dioxide (SO2) in the synthesis of 1,4 diazabicyclo[2.2.2]octane bis(sulfur dioxide) (DABSO).      
  • A reducing agent in the photocatalytic cyclization of 2-isocyanoaryl thioethers to synthesize 2-CF2/CF3-containing benzothiazoles in the presence of Ir-based catalyst.     
  • A reagent in the selective synthesis of 2-amino-1-iodonaphthalene from 2-naphthylamine in the presence of NaIO3/HCl.

In combination with carboxylic acids, it forms an effective system for the reductive acylation of aromatic nitro compounds.

supp_hazards

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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