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CAS 2050-34-2

CAS 2050-34-2 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 2050-34-2
CAS 2050-34-2PubChem CID 11035

4-[2-(2,4-Dihydroxyphenyl)diazenyl]benzenesulfonic acid

IUPAC name
4-[(2,4-dihydroxyphenyl)diazenyl]benzenesulfonic acid
Molecular formula
C12H10N2O5S
Molecular weight
294.29 g/mol
Exact mass
294.03104260 Da
XLogP3
1.7
Topological polar surface area
128.0 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
7
Covalent units
1
Defined stereocentres
0

Also known as

4-(2-(2,4-Dihydroxyphenyl)diazenyl)benzenesulfonic acidRefChem:1985464-((2,4-Dihydroxyphenyl)azo)benzenesulphonic acidAcid Orange 6 free acidChrysoine SResorcinol yellowTropaeolineChrysoine
16 more reported names
Resorcin yellowC.I. Food Yellow 8Chrysoine ExtraTropaeoline OChrysonine STropaeolin RChrysoine NChrysonis SGold YellowResorcine YellowTropaelin-OTropeolin OChrysoin GYellow TCurol Orange GDermina Yellow G
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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 2050-34-2

1 total
No records found for this CAS number.

How CAS 2050-34-2 is used on this site

CAS 2050-34-2 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 2050-34-2 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.