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CAS 1 record

CAS 7631-90-5

CAS 7631-90-5 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 7631-90-5
CAS 7631-90-5PubChem CID 23665763

Sodium Bisulfite

Sodium hydrogensulfite is an inorganic sodium salt having hydrogensulfite as the counterion. It has a role as a mutagen, an allergen, a reducing agent, a food antioxidant and a food colour retention agent. It is an inorganic sodium salt and a sulfite salt. It contains a hydrogensulfite. — ChEBI

IUPAC name
sodium hydrogen sulfite
Molecular formula
HNaO3S
Molecular weight
104.06 g/mol
Exact mass
103.95440935 Da
Topological polar surface area
79.6 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
4
Covalent units
2
Defined stereocentres
0

Also known as

sodium hydrogensulfiteSodium bisulphiteMonosodium sulfiteSulfurous acid, monosodium saltSodium sulhydrateUantax SBSHydrogen sodium sulfiteHydrogen sulfite sodium
16 more reported names
Monosodic sulphiteSodium hydrosulfite(DOT)Bisulfite de sodiumSodium bisulfite (1:1)Sodium sulfite (NaHSO3)Sodium bisulfite (NaHSO3)Fr-62Sulfurous acid, sodium salt (1:1)INS NO.222TZX5469Z6ICHEBI:26709INS-222NSC-60680E-222Sodium acid bisulfiteMonosodium salt of sulfurous acid
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7631-90-5

1 total
No records found for this CAS number.

How CAS 7631-90-5 is used on this site

CAS 7631-90-5 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 7631-90-5 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.