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CAS 1 record

CAS 2610-10-8

CAS 2610-10-8 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 2610-10-8
CAS 2610-10-8PubChem CID 75783

Sirius Red F3B

Sirius red F3B is an organic sodium salt resulting from the formal condensation of Sirius red F3B (acid form) with six equivalents of sodium hydroxide. A polyazo dye used principally in staining methods for collagen and amyloid. It has a role as a fluorochrome and a histological dye. It contains a Sirius red F3B(6-). — ChEBI

IUPAC name
hexasodium;4-hydroxy-7-[[5-hydroxy-7-sulfonato-6-[[2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl]diazenyl]naphthalen-2-yl]carbamoylamino]-3-[[2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl]diazenyl]naphthalene-2-sulfonate
Molecular formula
C45H26N10Na6O21S6
Molecular weight
1373.1 g/mol
Exact mass
1371.8984406 Da
Topological polar surface area
574.0 Ų
Hydrogen-bond donors
4
Hydrogen-bond acceptors
29
Covalent units
7
Defined stereocentres
0

Also known as

CHEBI:88279RefChem:1098571Direct Red 80C.I. Direct Red 80Sirius Red F 3BSirius Red F 3BASirius RedDiazol Light Red 3B
16 more reported names
Durazol Brillant Red BSC.I. Direct Red 80, hexasodium saltCI 357801294D5G72NHexasodium 7,7'-(carbonyldiimino)bis(4-hydroxy-3-((2-sulphonato-4-((4-sulphonatophenyl)azo)phenyl)azo)naphthalene-2-sulphonate)2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis(4-hydroxy-3-((2-sulfo-4-((4-sulfophenyl)azo)phenyl)azo)-, hexasodium salt7,7'-(Carbonyldiimino)bis[4-hydroxy-3-[[2-sulfo-4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid hexasodium saltPicrosirius RedFinisol Red BAFenaluz Red 7B2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis(4-hydroxy-3-(2-(2-sulfo-4-(2-(4-sulfophenyl)diazenyl)phenyl)diazenyl)-, sodium salt (1:6)HexaNa 7,7'-(carbonyldiimino)bis4-OH-3-2-sulphonato-4-(4-sulphonatophenyl)azophenylazonaphthalene-2-sulphonateDicorel Red L 3ASolophenyl Red 3BLFastusol Red L 8BPyrazoline Red BLWN
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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 2610-10-8

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How CAS 2610-10-8 is used on this site

CAS 2610-10-8 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 2610-10-8 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.