Why does CAS 66-76-2 appear in more than one EU cosmetic annex?

A substance identified by CAS 66-76-2 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 66-76-2?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 66-76-2 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 66-76-2

Q: How do I use CAS 66-76-2 for compliance screening?

Cross-reference CAS 66-76-2 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 66-76-2 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 66-76-2

CAS 66-76-2PubChem CID 54676038

Dicoumarol

Dicoumarol is a hydroxycoumarin that is methane in which two hydrogens have each been substituted by a 4-hydroxycoumarin-3-yl group. Related to warfarin, it has been used as an anticoagulant. It has a role as an anticoagulant, an EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor, a vitamin K antagonist and a Hsp90 inhibitor. — ChEBI

IUPAC name: 4-hydroxy-3-[(4-hydroxy-2-oxochromen-3-yl)methyl]chromen-2-one

Molecular formula: C19H12O6
Molecular weight: 336.3 g/mol
Exact mass: 336.06338810 Da
XLogP3: 2.6
Topological polar surface area: 93.1 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 6
Covalent units: 1
Defined stereocentres: 0

Also known as

dicumarolBishydroxycoumarinmelitoxinAntitrombosinBaracouminDicumarineAcadylAcavyl

16 more reported names

DicumanDicumolDicoumalDufaloneKumoranTemparinTrombosanCumidCumabis-hydroxycoumarinDicumaol RDicoumarolum3,3'-Methylenebis(4-hydroxycoumarin)AnathrombaseApekumarolDicoumerol

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:4513
ChEMBL:CHEMBL1466
EPA DTXSID:DTXSID8021729
PubMed:37640247
PubMed:33938965
PubMed:29581108
PubMed:29281794
PubMed:27558805
PubMed:26630137
PubMed:24466103
PubMed:22692362
PubMed:22486562
PubMed:22438886
PubMed:22430033
PubMed:21950657

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 66-76-2

1 total

Annex

Entry

231

Dicoumarol (INN)

200-632-9

How CAS 66-76-2 is used on this site

CAS 66-76-2 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 66-76-2 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 66-76-2 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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