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CAS 16731-55-8

CAS 16731-55-8 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 16731-55-8
CAS 16731-55-8PubChem CID 28019

Potassium Metabisulfite

Molecular formula
K2O5S2
Molecular weight
222.33 g/mol
Exact mass
221.8461284 Da
Topological polar surface area
125.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
6
Covalent units
3
Defined stereocentres
0

Also known as

Potassium disulfiteDipotassium pyrosulfiteDipotassium disulfiteSobisuDipotassium metabisulfitepotassium metabisulphitePotassium disulfite (K2S2O5)Potassium pentaoxodisulfate
16 more reported names
Pyrosulfurous acid, dipotassium saltIns-224Potassium metabisulfite (e 224)65OE787Q7WE-224RefChem:867887240-795-3Potassium pyrosulfitePotassium metabisulfite [NF]Potassium metabisulfite (NF)Dipotassium disulphiteCCRIS 1427HSDB 5062EINECS 240-795-3KaliumpyrosulfitUNII-65OE787Q7W
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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 16731-55-8

1 total
No records found for this CAS number.

How CAS 16731-55-8 is used on this site

CAS 16731-55-8 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 16731-55-8 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.