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CAS 2 records

CAS 17372-87-1

CAS 17372-87-1 matches 2 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 17372-87-1
CAS 17372-87-1PubChem CID 11048

Eosin

Eosin YS dye is an organic sodium salt that is 2',4',5',7'-tetrabromofluorescein in which the carboxy group and the phenolic hydroxy group have been deprotonated and the resulting charge is neutralised by two sodium ions. It has a role as a fluorochrome and a histological dye. It is an organobromine compound and an organic sodium salt. It contains a 2',4',5',7'-tetrabromofluorescein(2-). — ChEBI

IUPAC name
disodium;2-(2,4,5,7-tetrabromo-3-oxido-6-oxoxanthen-9-yl)benzoate
Molecular formula
C20H6Br4Na2O5
Molecular weight
691.9 g/mol
Exact mass
691.67031 Da
Topological polar surface area
89.5 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
5
Covalent units
3
Defined stereocentres
0

Also known as

Acid red 87Eosin yellowishEosine YellowishEosineEosine GEosin YSSodium eosineBromo acid
16 more reported names
Eosine YBromofluoresceinSodium eosinateBronze BromoCertiqual EosineBromo FluoresceinEosine AEosine JEosine BSEosine DAEosine FAEosine GFEosine OJEosine w/sEosine YBEosine YS
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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 17372-87-1

2 total
No records found for this CAS number.

How CAS 17372-87-1 is used on this site

CAS 17372-87-1 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 2 EU annex records share 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 17372-87-1 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.