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CAS 141-79-7

CAS 141-79-7 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 141-79-7
CAS 141-79-7PubChem CID 8858

Mesityl oxide

4-Methyl-3-penten-2-one, 9CI is an olefinic compound. It is functionally related to an acrylic acid. — ChEBI

IUPAC name
4-methylpent-3-en-2-one
Molecular formula
C6H10O
Molecular weight
98.14 g/mol
Exact mass
98.073164938 Da
XLogP3
1.4
Topological polar surface area
17.1 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

4-Methyl-3-penten-2-oneIsopropylideneacetoneMethyl isobutenyl ketone3-Penten-2-one, 4-methyl-Isobutenyl methyl ketoneMesityloxidMesityloxydeOssido di mesitile
16 more reported names
3-Isohexen-2-oneOxyde de mesityleMethyl 2-methyl-1-propenyl ketoneAcetone, isopropylidene-Methyl 2,2-dimethylvinyl ketone2-Methyl-4-oxo-2-pentene2-Methyl-2-pentenone-44-Metil-3-penten-2-one2,2-Dimethylvinyl methyl ketone2-Methyl-2-penten-4-one4-Methyl-3-pentene-2-one4-Methyl-3-penten-2-onFEMA No. 3368FEMA Number 33684-Methyl-3-penten-2-one, 9CINSC-38717
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 141-79-7

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How CAS 141-79-7 is used on this site

CAS 141-79-7 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 141-79-7 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.