CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
CAS 1 record

CAS 509-34-2

CAS 509-34-2 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

Check this CAS numberBrowse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 509-34-2
CAS 509-34-2PubChem CID 62357

Solvent Red 49

IUPAC name
3',6'-bis(diethylamino)spiro[2-benzofuran-3,9'-xanthene]-1-one
Molecular formula
C28H30N2O3
Molecular weight
442.5 g/mol
Exact mass
442.22564282 Da
XLogP3
5.8
Topological polar surface area
42.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
5
Covalent units
1
Defined stereocentres
0

Also known as

Rhodamine B baseC.I. Solvent Red 49Rhodamine B lactoneLacquer Pink SRhodamine S lactoneEljon Magenta TonerWaxoline Rhodamine BWaxoline Rhodamine BS
16 more reported names
Aizen Rhodamine B BaseRhodamine B Base ExtraRhodamine B Extra BaseRhodamine Base B ExtraKMK3588HIDRHODAMINE BASE BNSC-43944AIZEN SOT PINK 1Fluoran, 3',6'-bis(diethylamino)-UNII-KMK3588HIDBASO RED 546J34.966FC.I.45170:1EINECS 208-096-8NSC 439443',6'-Bis(diethylamino)spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one
Open full PubChem recordPubChem annotations3D structure image
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 509-34-2

1 total
No records found for this CAS number.

How CAS 509-34-2 is used on this site

CAS 509-34-2 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 509-34-2 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.