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Sodium sulfite

Name: Sodium sulfite
Brand: SIGALD

ACS reagent, ≥98.0%

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About This Item

Linear Formula:

Na₂SO₃

CAS Number:

7757-83-7

Molecular Weight:

126.04

EC Number:

231-821-4

MDL number:

MFCD00003503

UNSPSC Code:

12352302

PubChem Substance ID:

329752528

NACRES:

NA.21

grade

ACS reagent

Quality Level

200

Agency

suitable for SM 5210

Assay

≥98.0%

form

powder or crystals

impurities

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

pH

9.0-10.5 (25 °C, 126 g/L)

solubility

water: soluble 126 g/L at 20 °C

anion traces

chloride (Cl^-): ≤0.02%

cation traces

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

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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Salts

General description

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.

Application

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.

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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)

Performance of a pilot-scale packed bed reactor for perchlorate reduction using a sulfur oxidizing bacterial consortium.

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

Directed Evolution of Split APEX2 Peroxidase.

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

Spectrophotometric determination of EDTA in aqueous solution through ferroin formation using sodium sulfite as the reducer.

Jingang Wang et al.

Chemosphere, 91(3), 351-357 (2012-12-26)

This paper presents a simple, easy and reliable method for determination of EDTA (ethylenediaminetetraacetic acid) in aqueous system. Using EDTA chelating with ferric irons, an excessive amount of Fe(3+) was added to EDTA solution, and Fe(3+) in excess was reduced

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