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CAS 1 record

CAS 3248-93-9

CAS 3248-93-9 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 3248-93-9
CAS 3248-93-9PubChem CID 12448

Magenta Base

Rosanilin free base is an imine that is 4-methylidenecyclohexa-2,5-dien-1-imine in which the hydrogens of the methylidene group are replaced by 4-aminophenyl and 3-methyl-4-aminophenyl groups. The monohydrochloride salt is the histological dye 'rosanilin'. It has a role as a carcinogenic agent, a fluorochrome and a histological dye. It is an imine and a substituted aniline. It is a conjugate base of a rosanilin(1+). — ChEBI

IUPAC name
4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline
Molecular formula
C20H19N3
Molecular weight
301.4 g/mol
Exact mass
301.157897619 Da
XLogP3
3.7
Topological polar surface area
75.9 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
3
Covalent units
1
Defined stereocentres
0

Also known as

Solvent Red 41Fuchsine BaseRosaniline baseWaxoline Red AFuchsive basepara-RosanilineC.I. Solvent Red 41CI Solvent Red 41
16 more reported names
Fuchsin (basic)Fuchsine HF BaseC.I. Basic Violet 14, free baseCI 42510BCI Basic Violet 41, free baseHSDB 2955EINECS 221-832-2BRN 2814815MAGENTA BASE [HSDB]Benzenamine, 4-((4-aminophenyl)(4-imino-2,5-cyclohexadien-1-ylidene)methyl)-2-methyl-I8F3948441o-Toluidine, 4-((p-aminophenyl)(4-imino-2,5-cyclohexadien-1-ylidene)methyl)-2,4-Xylidine, alpha(sup 4)-(p-aminophenyl)-alpha(sup 4)-(4-imino-2,5-cyclohexadien-1-ylidene)-Benzenamine, 4-[(4-aminophenyl)(4-imino-2,5-cyclohexadien-1-ylidene)methyl]-2-methyl-RefChem:800448oToluidine, 4((paminophenyl)(4imino2,5cyclohexadien1ylidene)methyl)
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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 3248-93-9

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No records found for this CAS number.

How CAS 3248-93-9 is used on this site

CAS 3248-93-9 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 3248-93-9 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.