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CAS 1 record

CAS 7757-83-7

CAS 7757-83-7 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7757-83-7
CAS 7757-83-7PubChem CID 24437

Sodium Sulfite

Sodium sulfite is an inorganic sodium salt having sulfite as the counterion. It has a role as a reducing agent and a food preservative. It is an inorganic sodium salt and a sulfite salt. It contains a sulfite. — ChEBI

IUPAC name
disodium;sulfite
Molecular formula
Na2O3S
Molecular weight
126.05 g/mol
Exact mass
125.93635360 Da
Topological polar surface area
82.4 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
4
Covalent units
3
Defined stereocentres
0

Also known as

Disodium sulfiteSodium sulfite anhydrousSodium sulphiteSulfurous acid, disodium saltNatrium sulfurosumSulftechNatriumsulfidNatriumsulfit
16 more reported names
S-WATNatrii sulphisAnhydrous sodium sulfiteSodium sulfite (Na2SO3)Exsiccated sodium sulfiteNatrum sulphurosumSodium sulphite anhydrousSulfurous acid, sodium salt (1:2)Sodium sulfite, anhydrousSodium sulfite, exsiccatedDried sodium sulfiteDisodium sulfite (Na2SO3)Anhydrous sodium sulphiteSodium sulfite (2:1)VTK01UQK3GINS NO.221
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External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7757-83-7

1 total
No records found for this CAS number.

How CAS 7757-83-7 is used on this site

CAS 7757-83-7 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7757-83-7 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.