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239321

Sigma-Aldrich

Sulfito de sódio

ACS reagent, ≥98.0%

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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:
329752528
NACRES:
NA.21
Ensaio:
≥98.0%
grau:
ACS reagent
Formulário:
powder or crystals
solubilidade:
water: soluble 126 g/L at 20 °C

grau

ACS reagent

Nível de qualidade

200

Agency

suitable for SM 5210

Ensaio

≥98.0%

Formulário

powder or crystals

Impurezas

Free acid, passes test
≤0.005% insolubles
≤0.03 meq/g Titr. free base

pH

9.0-10.5 (25 °C, 126 g/L)

solubilidade

water: soluble 126 g/L at 20 °C

traços de ânion

chloride (Cl-): ≤0.02%

traços de cátion

Fe: ≤0.001%
heavy metals (as Pb): ≤0.001%

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 reducing agent. It is also used for sulfonation and sulfomethylation reactions. Additionally, it is used in the textile industry as a bleaching, de-sulfurizing, and dechlorinating agent. As an oxygen and free chlorine scavenger, Na2SO3 is employed in the water treatment process. Sodium sulfite participates in the purification and isolation of aldehydes and ketones by forming adducts with them. Other uses include the production of sodium thiosulfate, detergents, and dyes.

Aplicação

Sodium sulfite can be used:
  • As a reducing agent in the hydroxylation of arylboronic acids and arylboronic esters into corresponding phenols.
  • In the transformation of α-amino alcohol methanesulfonate hydrochlorides to sodium α-amino alkanesulfonates.
  • As a SO2 precursor in the multigram synthesis of DABCO·(SO2)2 abbreviated as DABSO.

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

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Certificados de análise (COA)

Lot/Batch Number
MKCQ9530
MKCQ4213
MKCQ2677
MKCQ0279
MKCP4262

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