Home/Chemicals/7757-83-7

Chemical substance record

Sodium sulfite

7757-83-7₂Na.O₃S126.044 g/mol

Salt and Compound WithChEBI source record

An inorganic sodium salt having sulfite as the counterion. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	7757-83-7	ChEBI ↗
Molecular formula	₂Na.O₃S	ChEBI ↗
Molar mass	126.044 g/mol	ChEBI ↗
Monoisotopic mass	125.93635 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:86477	ChEBI ↗

Names & structural identifiers

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Source preferred name

sodium sulfite

IUPAC name

disodium sulfite

InChIKey

GEHJYWRUCIMESM-UHFFFAOYSA-L

SMILES

O=S([O-])[O-].[Na+].[Na+]

InChI

InChI=1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2

Names & synonyms

disodium sulfite

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

inorganic sodium saltChEBI parent class · 38702 ↗sulfite saltChEBI parent class · 48857 ↗

inorganic salt inorganic molecular entity

Roles recorded in ChEBI

reducing agentfood preservative

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass

Amount

Input unit

Equivalent amount

0.00793374 mol

Uses 126.044 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Research & patent references

Selected source associations

Dissociation and reduction of covalent β-lactoglobulin-quinone adducts by dithiothreitol, tris(2-carboxyethyl)phosphine, or sodium sulfite. ↗Analytical biochemistry · 2015 Jun 1 · PMID 25700864

Effects of increasing concentrations of sodium sulfite on deoxynivalenol and deoxynivalenol sulfonate concentrations of maize kernels and maize meal preserved at various moisture content. ↗Toxins · 2015 Mar 9 · PMID 25760079

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:86477

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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