Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
Annex II Entry 1024 CMR21/08/2023

2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008.

2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.

Search similar Back to annex Compare
Prohibited substance— Annex II, EU Regulation 1223/2009
Entry: 1024
CMR

Chemical identity and properties

PubChem 2D chemical structure for CAS 149-57-5
CAS 149-57-5PubChem CID 8697

2-Ethylhexanoic Acid

2-Ethylhexanoic acid is a branched-chain fatty acid. — ChEBI

IUPAC name
2-ethylhexanoic acid
Molecular formula
C8H16O2
Molecular weight
144.21 g/mol
Exact mass
144.115029749 Da
XLogP3
2.6
Topological polar surface area
37.3 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

2-Ethylcaproic acidHexanoic acid, 2-ethyl-Ethylhexanoic acidEthylhexoic acid2-Ethylhexoic acidButylethylacetic acid2-Butylbutanoic acid3-Heptanecarboxylic acid
16 more reported names
2-ethyl-hexoic acidalpha-Ethylcaproic acid2-Ethyl-1-hexanoic acid01MU2J7VVZalpha-Ethylhexanoic acidNSC-8881RefChem:909811(+-)-2-ETHYLHEXANOIC ACID205-743-6Ethyl hexanoic acid2-ethyl hexanoic acid2-ethyl-hexanoic acidEthyl hexanoic acid, 2-alpha-ethyl caproic acid.alpha.-Ethylcaproic acid2-Ethylhexansaeure
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

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

Record details

Chemical name

2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008.

Regulatory information

Regulation

(EU) 2023/1490

See every entry this act set

CMR

CategoryCarcinogenicMutagenicReprotoxic
Cat. 2——✓

Key data

CAS
149-57-5/-
EC
205-743-6/-
Annex
II
Entry number
1024

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

Annex II 1023
Nearby record in the same annex

9-Vinylcarbazole

CAS: 1484-13-5
EC: 216-055-0
Annex II 1025
Nearby record in the same annex

Monuron

CAS: 150-68-5
EC: 205-766-1
Annex II 1022
Nearby record in the same annex

Chlordecone

CAS: 143-50-0
EC: 205-601-3
Annex II 1021
Nearby record in the same annex

Kresoxim-methyl

CAS: 143390-89-0
EC: 604-351-6
Annex II 1027
Nearby record in the same annex

Daminozide

CAS: 1596-84-5
EC: 216-485-9
Annex II 1020
Nearby record in the same annex

Isoxaflutole

CAS: 141112-29-0
EC: 604-222-4
Annex II 1028
Nearby record in the same annex

Alachlor (ISO)

CAS: 15972-60-8
EC: 240-110-8
Annex II 1018
Nearby record in the same annex

Propazine

CAS: 139-40-2
EC: 205-359-9

What Annex II means for 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008.

2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. 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. 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. 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 149-57-5/- is the unique numerical identifier assigned to 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. 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.

2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. 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.
Open INCI Checker

Source note for Annex II record 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008.

This page summarizes one Annex II record for 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. 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 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008., but confirm any final regulatory decision against the current official annex wording and source files.

View sourcesView updates

Tools & next steps

Check your formula

Paste a full INCI list to detect 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. and other flagged EU annex records in one pass.

INCI Checker

Compare entries

Compare 2-ethylhexanoic acid and its salts with the exception of those specified elsewhere in Annex VI to Regulation (EC) No 1272/2008. side by side with another annex record to review differences in restrictions, concentrations and annex placement.

Compare

Browse the annex

See all records in Annex II and compare regulatory conditions across substances in this annex.

Open Annex II