Why does CAS 309-00-2 appear in more than one EU cosmetic annex?

A substance identified by CAS 309-00-2 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 309-00-2?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 309-00-2 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 309-00-2

Q: How do I use CAS 309-00-2 for compliance screening?

Cross-reference CAS 309-00-2 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 309-00-2 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

Check this CAS number Browse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 309-00-2

CAS 309-00-2PubChem CID 12310947

Aldrin

Aldrin is an organochlorine compound resulting from the Diels-Alder reaction of hexachlorocyclopentadiene with norbornadiene. A proinsecticide (by epoxidation of the non-chlorinated double bond to give dieldrin), it was widely used as an insecticide before being banned in the 1970s as a persistent organic pollutant. It has a role as a proinsecticide and a persistent organic pollutant. It is an organochlorine insecticide and an organochlorine compound. — ChEBI

IUPAC name: (1S,2S,3S,6R,7R,8R)-1,8,9,10,11,11-hexachlorotetracyclo[6.2.1.13,6.02,7]dodeca-4,9-diene

Molecular formula: C12H8Cl6
Molecular weight: 364.9 g/mol
Exact mass: 363.872766 Da
XLogP3: 4.5
Topological polar surface area: 0.0 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 0
Covalent units: 1
Defined stereocentres: 6

Also known as

KortofinTatuzinhoAldocitSeedrinCompound 118HHDNAldrineAldrosol

16 more reported names

AldronAlgranAldrex 40SoilgrinAltoxAldrex 30AldriteRCRA waste number P004NCI-C00044Latka 118Aldrex 30 E.C.ENT 15,949SD 2794(1R,4S,4aS,5S,8R,8aR)-1,2,3,4,10,10-Hexachloro-1,4,4a,5,8,8a-hexahydro-1,4:5,8-dimethanonaphthaleneOZE3CLY605Hexachlorohexahydro-endo-exo-dimethanonaphthalene

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:2564
EPA DTXSID:DTXSID8020040
PubMed:17003167
PubMed:16497524
PubMed:15548381
PubMed:11258977

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 309-00-2

1 total

Annex

Entry

1057

Aldrin (ISO)

206-215-8

CMR

How CAS 309-00-2 is used on this site

CAS 309-00-2 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 309-00-2 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 309-00-2 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.

Check this CAS number

Tools & next steps

Check your formula

Scan a full INCI list, then use CAS 309-00-2 to cross-check any supplier documents behind the matched substances.

INCI Checker

Browse annexes

Browse all EU cosmetic regulation annexes by category.

All annexes

Search by name

Search for INCI names, aliases or related identifiers that sit alongside CAS 309-00-2 in your documentation.