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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

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
71988314541.06657
Sodium sulfite ≥98%

Sigma-Aldrich

S0505

Sodium sulfite

-
Sodium sulfite BioUltra, anhydrous, ≥98% (RT)

Sigma-Aldrich

71988

Sodium sulfite

Premium Grade
Sodium sulfite puriss. p.a., reag. Ph. Eur., anhydrous, 98-100.0% (iodometric)

Sigma-Aldrich

31454

Sodium sulfite

-
Sodium sulfite anhydrous for analysis EMSURE® Reag. Ph Eur

Supelco

1.06657

Sodium sulfite

-
form

powder or crystals

form

powder

form

solid

form

powder

pH

9.0-10.5 (25 °C, 126 g/L)

pH

9.0-10.5 (25 °C, 1 M in H2O)

pH

9.0-10.5 (25 °C, 126 g/L)

pH

8.8-10 (20 °C, 50 g/L in H2O)

Quality Level

100

Quality Level

200

Quality Level

100

Quality Level

300

agency

suitable for SM 5210

agency

-

agency

USP/NF, reag. Ph. Eur.

agency

reag. Ph. Eur.

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.

Supplementary Hazards

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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