08981

Sodium sulfite

analytical standard

• Synonym(s): E221
• Linear Formula: Na₂SO₃
• CAS Number: 7757-83-7
• Molecular Weight: 126.04
• NACRES: NA.24
• PubChem Substance ID: 329748654
• UNSPSC Code: 85151701
• EC Number: 231-821-4
• MDL number: MFCD00003503

Properties

• grade: analytical standard
• Quality Segment: 100
• assay: ≥98% (RT)
• shelf life: limited shelf life, expiry date on the label
• solubility: H₂O: 1 g/10 mL, clear, colorless
• application(s): cleaning products; cosmetics; food and beverages; personal care
• format: neat
• 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

General description

This substance is listed on the positive list of the EU regulation 10/2011 for plastics intended to come into contact with food.

Find all available reference materials for compounds listed in 10/2011 here

Application

• Oxygen scavenging and contaminant removal: Sodium sulfite′s efficacy in removing organic contaminants through oxygen scavenging in various chemical systems was documented, illustrating its critical role in environmental cleanup and wastewater treatment technologies (Zhou et al., 2023).


• Disinfection by-product management: Sodium sulfite is reviewed for its impact and mechanisms as a residual chlorine quencher, highlighting its potential to reduce harmful disinfection by-products in water treatment processes, which is vital for ensuring safe pharmaceutical and biotechnical operations (Li et al., 2023).

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable