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CAS 149-57-5

CAS 149-57-5 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 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.

Records for CAS 149-57-5

1 total
No records found for this CAS number.

How CAS 149-57-5 is used on this site

CAS 149-57-5 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 149-57-5 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.