CAS 2650-18-2 — 2 EU Cosmetic Records

Chemical identity and properties

PubChem 2D chemical structure for CAS 2650-18-2

CAS 2650-18-2PubChem CID 17559

C.I. Acid Blue 9

Erioglaucine A is an aromatic amine. — ChEBI

IUPAC name: diazanium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]benzenesulfonate

Molecular formula: C37H42N4O9S3
Molecular weight: 783.0 g/mol
Exact mass: 782.21139245 Da
Topological polar surface area: 205.0 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 10
Covalent units: 3
Defined stereocentres: 0

Also known as

Erioglaucine AAlphazurine FGErioglaucineErioglaucine EJapan Blue 205Alphazurine FGNDNeptune Blue WFFenazo Blue XR

16 more reported names

Patent Blue AECalcocid Blue EGKiton Blue ARXylene Blue VSGNeptune Blue BRAPatent Blue 2YCalcocid Blue 2GTortrazine C extraWater Blue 9Bucacid Azure BlueHidacid Azure BlueAcid Blue AE-SFBleu Brilliant FCFBrilliant Blue LakeKiton Pure Blue LPro-Jet Blue OAM

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:138824
EPA DTXSID:DTXSID4034310

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 2650-18-2

2 total

No records found for this CAS number.

How CAS 2650-18-2 is used on this site

CAS 2650-18-2 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 2650-18-2 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.