Why does CAS 302-79-4 appear in more than one EU cosmetic annex?

A substance identified by CAS 302-79-4 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.

How do I check if my formula contains a substance with CAS 302-79-4?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 302-79-4 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 302-79-4

Q: How do I use CAS 302-79-4 for compliance screening?

Cross-reference CAS 302-79-4 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 302-79-4 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 302-79-4

CAS 302-79-4PubChem CID 444795

Retinoic Acid

All-trans-retinoic acid is a retinoic acid in which all four exocyclic double bonds have E- (trans-) geometry. It has a role as an antioxidant, an antineoplastic agent, a keratolytic drug, a signalling molecule, a retinoid X receptor agonist, an anti-inflammatory agent, a retinoic acid receptor agonist, an AP-1 antagonist and a human metabolite. It is a vitamin A and a retinoic acid. It is a conjugate acid of an all-trans-retinoate. — ChEBI

IUPAC name: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenoic acid

Molecular formula: C20H28O2
Molecular weight: 300.4 g/mol
Exact mass: 300.208930132 Da
XLogP3: 6.3
Topological polar surface area: 37.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

tretinoinall-trans-Retinoic acidVitamin A acidtrans-Retinoic acidATRAAberelEudynaDermairol

16 more reported names

Renovaall-trans-Vitamin A acidCordes vasRetin ATretin Mall-trans-TretinoinRetionic acidall-trans-Vitamin A1 acidbeta-RaRetin-A MicroVitamin A1 acid, all-trans-beta-Retinoic acidTretinoinaAtralinall-(E)-Retinoic acidAll Trans Retinoic Acid

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:15367
ChEMBL:CHEMBL38
EPA DTXSID:DTXSID7021239
PubMed:41627613
PubMed:40504024
PubMed:40359302
PubMed:40064378
PubMed:40024514
PubMed:39571964
PubMed:38971454
PubMed:38179723
PubMed:38091671
PubMed:38070836
PubMed:38040126
PubMed:37989595

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 302-79-4

1 total

Annex

Entry

375

Tretinoin (INN) (retinoic acid and its salts)

206-129-0

How CAS 302-79-4 is used on this site

CAS 302-79-4 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 302-79-4 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 302-79-4 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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Tools & next steps

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