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CAS 16957-70-3

CAS 16957-70-3 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 16957-70-3
CAS 16957-70-3PubChem CID 5365909

2-Methyl-2-pentenoic acid

2-Methyl-2-pentenoic acid is a methyl-branched fatty acid. It is a conjugate acid of a 2-methyl-(2E)-pentenoate(1-). — ChEBI

IUPAC name
(E)-2-methylpent-2-enoic acid
Molecular formula
C6H10O2
Molecular weight
114.14 g/mol
Exact mass
114.068079557 Da
XLogP3
1.4
Topological polar surface area
37.3 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

trans-2-Methyl-2-pentenoic acid3142-72-1(E)-2-methyl-2-pentenoic acid(2E)-2-methylpent-2-enoic acidFEMA No. 31952-Pentenoic acid, 2-methyl-, (E)-2-Pentenoic acid, 2-methyl-, (2E)-2-Pentenoic acid, 2-methyl-
16 more reported names
44I99E898B(E)-2-Methylpent-2-en-1-oic acid2-Pentene-2-carboxylicacid(2E)-2-Methyl-2-pentenoic acidStrawberry acidUNII-44I99E898B(2E)-2-Methyl-2-pentenoic Acid; (E)-2-Methyl-2-pentenoic Acid; (2E)-2-Methylpent-2-enoic AcidEINECS 221-552-0EINECS 241-026-4(E)-2-methylpent-2-enoicacidJJYWRQLLQAKNAD-SNAWJCMRSA-CHEBI:173385trans-2-methyl-pent-2-enoic acidtrans-2-Methyl-2-pentenoic acid, 97%2-METHYL-2-PENTENOIC ACID [FCC]LS-13152
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 16957-70-3

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How CAS 16957-70-3 is used on this site

CAS 16957-70-3 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share 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 16957-70-3 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.