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S0505

Sigma-Aldrich

Sulfito de sódio

≥98%

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About This Item

Fórmula linear:
Na2SO3
Número CAS:
7757-83-7
Peso molecular:
126.04
Número CE:
231-821-4
Número MDL:
MFCD00003503
Código UNSPSC:
12352302
ID de substância PubChem:
329824427
NACRES:
NA.55

Agency

suitable for SM 5210

Ensaio

≥98%

forma

powder or crystals

pH

9.0-10.5 (25 °C, 126 g/L)

cadeia de caracteres SMILES

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

InChI

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

chave InChI

GEHJYWRUCIMESM-UHFFFAOYSA-L

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Descrição geral

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.

Aplicação

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.

Perigos de suplementos

EUH031

Código de classe de armazenamento

13 - Non Combustible Solids

Classe de risco de água (WGK)

WGK 1

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Certificados de análise (COA)

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Sulfito de sódio puriss., meets analytical specification of Ph. Eur., BP, NF, anhydrous, 95.0-100.0% (iodometric)

Sigma-Aldrich

13471

Sulfito de sódio

Sulfito de sódio puriss. p.a., reag. Ph. Eur., anhydrous, 98-100.0% (iodometric)

Sigma-Aldrich

31454

Sulfito de sódio

Sodium tetrathionate dihydrate ≥98% (titration)

Sigma-Aldrich

S5758

Sodium tetrathionate dihydrate

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