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SX0785

Sodium sulfite

Name: Sodium sulfite
Brand: MM

anhydrous, Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

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About This Item

Linear Formula:

Na₂SO₃

CAS Number:

7757-83-7

Molecular Weight:

126.04

UNSPSC Code:

12352302

EC Index Number:

231-821-4

MDL number:

MFCD00003503

Assay:

≥98.0% (iodometric)

Grade:

ACS reagent

Form:

powder

Solubility:

220 g/L

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Properties

grade

ACS reagent

Quality Level

200

assay

≥98.0% (iodometric)

form

powder

impurities

≤0.005% Insoluble matter, ≤0.03 meq/g Titrable free base

pH

8.8-10 (20 °C, 50 g/L in H₂O)

mp

>500 °C (decomposition)

solubility

220 g/L

anion traces

chloride (Cl^-): ≤0.02%

cation traces

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

shipped in

ambient

storage temp.

room temp

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

Description

Application

Comparative Studies of Organic Contaminant Removal in Different Calcium Sulfite-Enhanced Oxidant/Fe(II) Systems: This research explores the effectiveness of sodium sulfite in enhancing the removal of organic contaminants through various oxidant systems. (Zhou et al., 2023).

Review of Traditional and Emerging Residual Chlorine Quenchers on Disinfection By-Products: Focuses on the role of sodium sulfite as a residual chlorine quencher in water treatment processes, analyzing its impact on reducing harmful by-products and enhancing water quality (Li et al., 2023).

Boosting the Photoelectrochemical Performance of Bismuth Vanadate Photoanode Through Homojunction Construction: Investigates how sodium sulfite can improve the photoelectrochemical properties of bismuth vanadate, significant for renewable energy applications, particularly in solar energy conversion (Wang et al., 2023).

Light-driven Oxidative Demethylation Reaction Catalyzed by a Rieske-type Non-heme Iron Enzyme Stc2: Demonstrates the use of sodium sulfite in enzymatic reactions to achieve oxidative demethylation, which is crucial for synthetic biology and enzyme engineering (Hu et al., 2022).

Preparation of Nano Disperse Dyes Using Sulfomethylated Lignin: Effects of Sulfonic Group Contents: Highlights the application of sodium sulfite in the preparation of environmentally friendly nano disperse dyes from lignin, emphasizing its potential in sustainable material science (Tang et al., 2023).

Analysis Note

Assay (iodometric): 98.0% min
Chloride (Cl): 0.02% max
Free acid: To pass test
Heavy metals (as Pb): 0.001% max
Insoluble matter: 0.005% max
Iron (Fe): 0.001% max
Titrable free base: 0.03meq/g max

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Storage Class

13 - Non Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c