Pular para o conteúdo
Merck
Todas as fotos(3)

Documentos Principais

239321

Sigma-Aldrich

Sulfito de sódio

ACS reagent, ≥98.0%

Faça loginpara ver os preços organizacionais e de contrato


About This Item

Fórmula linear:
Na2SO3
Número CAS:
Peso molecular:
126.04
Número CE:
Número MDL:
Código UNSPSC:
12352302
ID de substância PubChem:
NACRES:
NA.21
Preço e disponibilidade não estão disponíveis no momento.

grau

ACS reagent

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

Procurando produtos similares? Visita Guia de comparação de produtos

Categorias relacionadas

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


Escolha uma das versões mais recentes:

Certificados de análise (COA)

Lot/Batch Number

Não está vendo a versão correta?

Se precisar de uma versão específica, você pode procurar um certificado específico pelo número do lote ou da remessa.

Já possui este produto?

Encontre a documentação dos produtos que você adquiriu recentemente na biblioteca de documentos.

Visite a Biblioteca de Documentos

Reaction kinetics of sodium sulfite oxidation by the rapid-mixing method.
Barron CH and O'Hern HA.
Chemical Engineering Science, 21(5), 397-404 (1966)
New plasticizers for wheat gluten films.
Irissin-Mangata J, et al.
European Polymer Journal, 37(8), 1533-1541 (2001)
Amber R Boles et al.
Biotechnology and bioengineering, 109(3), 637-646 (2011-10-22)
A novel sulfur-utilizing perchlorate reducing bacterial consortium successfully treated perchlorate (ClO₄⁻) in prior batch and bench-scale packed bed reactor (PBR) studies. This study examined the scale up of this process for treatment of water from a ClO ₄⁻ and RDX contaminated
Yisu Han et al.
ACS chemical biology, 14(4), 619-635 (2019-03-09)
APEX is an engineered peroxidase that catalyzes the oxidation of a wide range of substrates, facilitating its use in a variety of applications from subcellular staining for electron microscopy to proximity biotinylation for spatial proteomics and transcriptomics. To further advance
Fabian Leinisch et al.
Chemical research in toxicology, 24(12), 2217-2226 (2011-10-19)
Nitrone spin traps such as 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) are commonly used for free radical detection. Though proven examples are rare, artifact formation must be considered. For example, the Forrester-Hepburn mechanism yields the same radical adduct as that formed by genuine radical

Conteúdo relacionado

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

Questions

1–2 of 2 Questions  
  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

Reviews

No rating value

Active Filters

Nossa equipe de cientistas tem experiência em todas as áreas de pesquisa, incluindo Life Sciences, ciência de materiais, síntese química, cromatografia, química analítica e muitas outras.

Entre em contato com a assistência técnica