Why does CAS 3248-91-7 appear in more than one EU cosmetic annex?

A substance identified by CAS 3248-91-7 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts — for example, restricted under Annex III with specific conditions, while also appearing in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

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Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 3248-91-7 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 3248-91-7

Q: How do I use CAS 3248-91-7 for compliance screening?

Cross-reference CAS 3248-91-7 against your raw material specification sheets and CoA documents. When it appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met. All annex entries sharing this CAS number are listed on this page.

CAS 3248-91-7 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 3248-91-7

CAS 3248-91-7PubChem CID 14454445

New Fuchsin

New fuchsin is a hydrochloride that is the monohydrochloride of 4-[(4-aminophenyl)(4-iminocyclohexa-2,5-dien-1-ylidene)methyl]-2-methylaniline. One of the minor constituents of Basic fuchsin, together with pararosanilin, rosanilin and magenta II. It has a role as a fluorochrome and a histological dye. It contains a new fuchsin(1+). — ChEBI

IUPAC name: 4-[(4-amino-3-methylphenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-2-methylaniline;hydrochloride

Molecular formula: C22H24ClN3
Molecular weight: 365.9 g/mol
Exact mass: 365.1658755 Da
Topological polar surface area: 75.9 Å²
Hydrogen-bond donors: 4
Hydrogen-bond acceptors: 3
Covalent units: 2
Defined stereocentres: 0

Also known as

BASIC VIOLET 2Magenta IIINeofuchsineNew magentaRemacryl magenta BAstrazon fuchsine GNTrimethyl fuchsinC.I. Basic Violet 2

16 more reported names

Fuchsin NBNSC-9858CI 42520C.I. 42520CHEBI:87671A051F48W36Benzenamine, 4,4'-((4-imino-3-methyl-2,5-cyclohexadien-1-ylidene)methylene)bis(2-methyl-, monohydrochlorideRefChem:572236C.I. Basic Violet 2 monohydrochloride221-831-7New fuchsineCalcozine New FuchsineFuchsine SBP4,4'-((4-Imino-3-methylcyclohexa-2,5-dien-1-ylidene)methylene)bis(2-methylaniline) hydrochlorideMagenta ABNNew fuchsine G crystal

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:87671
ChEMBL:CHEMBL1979779
EPA DTXSID:DTXSID80879817

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 3248-91-7

1 total

Annex

Entry

CI 42520 / BASIC VIOLET 2

4-[(4-Amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride

5 ppm

221-831-7

Max concentration

How CAS 3248-91-7 is used on this site

CAS 3248-91-7 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 3248-91-7 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.

Frequently asked questions

A substance identified by CAS 3248-91-7 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

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