Why does CAS 632-99-5 appear in more than one EU cosmetic annex?

A substance identified by CAS 632-99-5 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 632-99-5 to screen it directly, then review every linked annex record and supplier document.

CAS 2 records

CAS 632-99-5

Q: How do I use CAS 632-99-5 for compliance screening?

Cross-reference CAS 632-99-5 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 632-99-5 matches 2 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 632-99-5

CAS 632-99-5PubChem CID 12447

Basic fuchsin

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

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

Molecular formula: C20H20ClN3
Molecular weight: 337.8 g/mol
Exact mass: 337.1345753 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 14Fuchsin basicBasic fuchsineRosanilineFuchsinMAGENTAFuchsineFuchsin, basic

16 more reported names

C.I. Basic Violet 14Basic magentaMagenta IRose anilineRosaniline chlorideRosaniline hydrochlorideRosanilinium chlorideAizen magentaMethyl fuchsinDiamond FuchsinMitsui MagentaDiabasic magentaDiamond fuchsineFuchsine AFuchsine GFuchsine N

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:87665
ChEMBL:CHEMBL1979636
EPA DTXSID:DTXSID6021246

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 632-99-5

2 total

Annex

Entry

CI 42510

(4-(4-Aminophenyl)(4-iminocyclohexa-2,5-dienylidene)methyl)-2-methylaniline hydrochloride

211-189-6

Max concentration

How CAS 632-99-5 is used on this site

CAS 632-99-5 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 632-99-5 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 632-99-5 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.

The INCI Checker accepts ingredient names, CAS numbers and EC numbers. Check this CAS number directly, then verify the result against supplier specification sheets and every linked annex condition.

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