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CAS 2 records

CAS 4430-18-6

CAS 4430-18-6 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 4430-18-6
CAS 4430-18-6PubChem CID 23669622

C.I. Acid Violet 43

IUPAC name
sodium 2-[(4-hydroxy-9,10-dioxoanthracen-1-yl)amino]-5-methylbenzenesulfonate
Molecular formula
C21H14NNaO6S
Molecular weight
431.4 g/mol
Exact mass
431.04395262 Da
Topological polar surface area
132.0 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
7
Covalent units
2
Defined stereocentres
0

Also known as

ACID VIOLET 43CI 60730G5UX3K0728NSC-47721Benzenesulfonic acid, 2-((9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)amino)-5-methyl-, sodium salt (1:1)Murasaki 401RefChem:552649224-618-7
16 more reported names
Benzenesulfonic Acid, 2-((9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)amino)-5-meth-yl-, Monosodium SaltACIDVIOLET4311362 VioletAllzurol PurpleSolway Purple RSolway Purple RAAlizarine Irisol RFenalan Violet 3BSolanol Violet 3BAlizarin Violanol RSupracen Violet 3BAhcoquinone Blue IRAlizarine Irisol RDAlizarine Purple RSAlizarine Violet NRAlizarine Violanol R
Open full PubChem recordPubChem annotations3D structure image
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 4430-18-6

2 total
Annex
III
Entry
291

ACID VIOLET 43

Sodium, 4- [(9,10-dihydro-4- hydroxy-9,10-dioxo-1-anthryl) amino]toluene-3- sulphonate

Hair dye substance in non-oxidative hair dye products

EC
224-618-7
Max concentration
Annex
IV
Entry
90

CI 60730

Sodium 4-[(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthryl)amino]toluene-3-sulphonate
EC
224-618-7
Max concentration

How CAS 4430-18-6 is used on this site

CAS 4430-18-6 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 4430-18-6 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 4430-18-6 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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