Sodium sulfite

SIAL/08981 - analytical standard

Synonym: E221

CAS Number: 7757-83-7
Empirical Formula (Hill Notation): Na₂O₃S
Molecular Weight: 126.04
EC Number: 231-821-4
MDL Number: MFCD00003503
Linear Formula: Na₂SO₃
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-08981-1G	1 g	$70.00 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

application(s)	cleaning products cosmetics food and beverages personal care
assay	≥98% (RT)
format	neat
grade	analytical standard
InChI	1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
InChI key	GEHJYWRUCIMESM-UHFFFAOYSA-L
Quality Level	100
shelf life	limited shelf life, expiry date on the label
SMILES string	[Na+].[Na+].[O-]S([O-])=O
solubility	H₂O: 1 g/10 mL, clear, colorless

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 ).

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 External link

Risk Statements	31
RIDADR	NONH for all modes of transport
WGK Germany	WGK 1
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

Purity	≥98% (RT)
UNSPSC	85151701

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