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Annex II Entry 1580 CMR18/06/2025

cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2]

cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2] is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.

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Prohibited substance— Annex II, EU Regulation 1223/2009
Entry: 1580
CMR

Chemical identity and properties

PubChem 2D chemical structure for CAS 166900-80-7
CAS 166900-80-7CAS 57966-95-7PubChem CID 5364079

Cymoxanil

Cymoxanil is a member of the class of ureas that is urea in which the two nitrogen atoms are substituted by an ethyl group and a 2-cyano-2-(methoxyimino)acetyl group respectively. A fungicide used to control Peronosporales on a range of crops including vines, hops and potatoes. It has a role as a xenobiotic, an environmental contaminant and an antifungal agrochemical. It is a nitrile, an oxime O-ether, a member of ureas and an aliphatic nitrogen antifungal agent. — ChEBI

IUPAC name
(1E)-2-(ethylcarbamoylamino)-N-methoxy-2-oxoethanimidoyl cyanide
Molecular formula
C7H10N4O3
Molecular weight
198.18 g/mol
Exact mass
198.07529019 Da
XLogP3
0.7
Topological polar surface area
104.0 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
5
Covalent units
1
Defined stereocentres
0

Also known as

Curzate1-(2-Cyano-2-methoxyiminoacetyl)-3-ethylureaDpx 3217BioZateQJO7SS7R8UDPX-32172-Cyano-N-(ethylcarbamoyl)-2-(methoxyimino)acetamideAKTUAN
16 more reported names
TOSCA MZ2-Cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)acetamide2-Cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)-acetamideCHEBI:81788Acetamide, 2-cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)-2-cyano-n-ethylcarbamoyl-2-methoxyiminoacetamideAcetamide, 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)-RefChem:130115(E)-2-((ethylcarbamoyl)amino)-2-oxoethenecarbonimidoyl cyanidecymoxanil (ISO); 2-cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)acetamide261-043-0DPX 3217M(1E)-2-(ethylcarbamoylamino)-N-methoxy-2-oxo-acetimidoyl cyanideacetamide, 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)-, (2E)-2-(3-Ethylureido)-N-methoxy-2-oxoacetimidoyl cyanideCymoxanil [ISO]
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Record details

Chemical name

cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2]

Chemical / IUPAC name

Cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide

Regulatory information

Regulation

(EU) 2025/877

See every entry this act set

CMR

CategoryCarcinogenicMutagenicReprotoxic
Cat. 2——✓

Key data

CAS
57966-95-7/ 166900-80-7
EC
261-043-0/-
Annex
II
Entry number
1580

Direct matches are limited for this record, so nearby entries from Annex II are shown as well.

Annex II 1578
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Paraformaldehyde

CAS: 30525-89-4
EC: 608-494-5
Annex II 1577
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Formaldehyde

CAS: 50-00-0
EC: 200-001-8
Annex II 1575
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Styrene

CAS: 100-42-5
EC: 202-851-5

What Annex II means for cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2]

cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2] is listed as a prohibited substance under Annex II of EU Cosmetics Regulation 1223/2009 and must not be intentionally added. Article 17 separately addresses unintended small quantities that are technically unavoidable under good manufacturing practice and compatible with the Article 3 safety requirement.

Formulators must screen their ingredients and raw materials to ensure none contain this substance. Suppliers should provide documentation confirming absence when requested.

The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Verify this substance is absent from all raw materials and finished formulations.
  • Request absence confirmation or CoA from raw material suppliers.
  • Document the screening result in the Product Information File (PIF).
  • This substance has CMR classification. Review the CMR table above and verify current Annex II/III status before use.

Frequently asked questions

Yes. cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2] is listed in Annex II of EU Cosmetics Regulation 1223/2009 and is prohibited as an intentionally added cosmetic ingredient. Article 17 provides a narrow exception for unintended small quantities that are technically unavoidable under good manufacturing practice, provided the product remains safe under Article 3.

CAS 57966-95-7/ 166900-80-7 is the unique numerical identifier assigned to cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2] by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2] has a CMR (carcinogenic, mutagenic or reprotoxic) classification under EU CLP Regulation. Under Article 15 of EU Cosmetics Regulation 1223/2009, CMR substances of category 1A or 1B are prohibited in cosmetics unless specifically permitted. Category 2 CMR substances may be used only if assessed safe by the SCCS. Always verify current annex status and any applicable derogations before use.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex II record cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2]

This page summarizes one Annex II record for cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2] from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex II conditions for cymoxanil (ISO); 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [1]/ (2E)-2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)acetamide; [2], but confirm any final regulatory decision against the current official annex wording and source files.

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