Why does CAS 34256-82-1 appear in more than one EU cosmetic annex?

A substance identified by CAS 34256-82-1 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 34256-82-1 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 34256-82-1

Q: How do I use CAS 34256-82-1 for compliance screening?

Cross-reference CAS 34256-82-1 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 34256-82-1 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 34256-82-1

CAS 34256-82-1PubChem CID 1988

Acetochlor

Acetochlor is a monocarboxylic acid amide that is N-phenylacetamide carrying an ethyl and a methyl group at positions 2 and 6 respectively on the benzene ring while one of the methyl hydrogens as well as the hydrogen attached to the nitrogen atom have been replaced by a chloro and an ethoxymethyl group respectively. It has a role as a herbicide, a xenobiotic and an environmental contaminant. It is a monocarboxylic acid amide, an organochlorine compound and an aromatic amide. It is functionally related to a N-phenylacetamide. — ChEBI

IUPAC name: 2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamide

Molecular formula: C14H20ClNO2
Molecular weight: 269.77 g/mol
Exact mass: 269.1182566 Da
XLogP3: 3.2
Topological polar surface area: 29.5 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

AzetochlorAcetochloreHarnessAcenitErunitNevirexAcetamide, 2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)-Caswell No. 003B

16 more reported names

MON 097MG 022-Chloro-2'-methyl-6-ethyl-N-ethoxymethylacetanilide2-Chloro-N-(ethoxymethyl)-6'-ethyl-o-acetotoluidide8L08WMO94K2-Chloro-N-(ethoxymethyl)-6'-ethylacet-o-toluidideCHEBI:2394RefChem:108989251-899-3Acetochlor standard solutionAcetochlore [ISO-French]Acetochlor [ISO]CAS-34256-82-1CCRIS 7709HSDB 6550EINECS 251-899-3

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:2394
ChEMBL:CHEMBL1517425
EPA DTXSID:DTXSID8023848
PubMed:39240656
PubMed:34516295
PubMed:33049310
PubMed:28973306
PubMed:28472748
PubMed:27384423
PubMed:26397822
PubMed:25622337
PubMed:25291404
PubMed:23099949
PubMed:22982388
PubMed:22946187

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 34256-82-1

1 total

Annex

Entry

1631

Acetochlor (ISO); 2- chloro-N-(ethoxymethyl)-N-(2-ethyl-6- methylphenyl)acetamide

251-899-3

CMR

How CAS 34256-82-1 is used on this site

CAS 34256-82-1 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 34256-82-1 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 34256-82-1 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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