Why does CAS 66246-88-6 appear in more than one EU cosmetic annex?

A substance identified by CAS 66246-88-6 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 66246-88-6 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 66246-88-6

Q: How do I use CAS 66246-88-6 for compliance screening?

Cross-reference CAS 66246-88-6 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 66246-88-6 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 66246-88-6

CAS 66246-88-6PubChem CID 91693

Penconazole

1-[2-(2,4-dichlorophenyl)pentyl]1,2,4-triazole is a member of the classof triazoles that is 1,2,4-triazole substituted at position 1 by a 2-(2,4-dichlorophenyl)pentyl group. It is a dichlorobenzene and a member of triazoles. — ChEBI

IUPAC name: 1-[2-(2,4-dichlorophenyl)pentyl]-1,2,4-triazole

Molecular formula: C13H15Cl2N3
Molecular weight: 284.18 g/mol
Exact mass: 283.0643029 Da
XLogP3: 4.4
Topological polar surface area: 30.7 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

TopazetopasOnmexAward1-(2-(2,4-Dichlorophenyl)pentyl)-1H-1,2,4-triazole1H-1,2,4-Triazole, 1-[2-(2,4-dichlorophenyl)pentyl]-3UN9F9ZJ43CGA-71818

16 more reported names

1-[2-(2,4-Dichlorophenyl)pentyl]-1H-1,2,4-triazole1H-1,2,4-Triazole, 1-(2-(2,4-dichlorophenyl)pentyl)-Gold TopazGold Topaz 8121RefChem:56368CHEBI:819701-(2,4-dichloro-beta-propylphenethyl)-1H-1,2,4-triazole266-275-6TopazCGA 71818Topaze CPenconazole [BSI:ISO]EINECS 266-275-6BRN 0541488UNII-3UN9F9ZJ43Penconazole (Standard)

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:83993
ChEMBL:CHEMBL481474
EPA DTXSID:DTXSID8042260
PubMed:23084822
PubMed:22981507
PubMed:22939932
PubMed:22878863
PubMed:22715816
PubMed:22715691
PubMed:22584298
PubMed:22523534
PubMed:22496832
PubMed:22424061
PubMed:22396740
PubMed:22271588

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 66246-88-6

1 total

Annex

Entry

1573

Penconazole (ISO); 1-[2-(2,4-dichlorophenyl)pentyl]-1H-1,2,4-triazole

266-275-6

CMR

How CAS 66246-88-6 is used on this site

CAS 66246-88-6 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 66246-88-6 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 66246-88-6 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.

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