Official EU label nameGlossary entry 16600

METHYLBUTENES

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

0 markets with evidence

Markets checked

Markets with evidence

Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:26760-64-5

EC:247-975-0

Ingredient index records:

METHYLBUTENES

Cosmetic functions: SOLVENT

2-Methylbutene

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1 matched or reported name

METHYLBUTENES

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name METHYLBUTENES.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 26760-64-5

CAS 26760-64-5PubChem CID 11240

2-Methyl-1-butene

2-methylbut-1-ene is an alkene that is but-1-ene carrying a methyl substituent at position 2. — ChEBI

IUPAC name: 2-methylbut-1-ene

Molecular formula: C5H10
Molecular weight: 70.13 g/mol
Exact mass: 70.078250319 Da
XLogP3: 2.5
Topological polar surface area: 0.0 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 0
Covalent units: 1
Defined stereocentres: 0

Also known as

1-Butene, 2-methyl-UNII-33C9Y0I55H2-methyl-1-butyleneHSDB 569533C9Y0I55HEINECS 209-250-7NSC 72414NSC-72414

16 more reported names

UN24591-BUTENE,2-METHYLCHEBI:779152-METHYLBUT-1-ENE [HSDB]UN 2371UN 2459gammaIsoamylene1Isoamylene2Methylbut1ene1Butene, 2methylRefChem:87987InChI=1/C5H10/c1-4-5(2)3/h2,4H2,1,3HIsopenteneMHNNAWXXUZQSNM-UHFFFAOYSA-N563-46-22-Methylbutene

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External database identifiers

ChEBI:CHEBI:77915
EPA DTXSID:DTXSID3052224
PubMed:22902752
PubMed:22751867
PubMed:22672647
PubMed:22611376
PubMed:22590330
PubMed:22580055
PubMed:22563402
PubMed:22558074
PubMed:22545152
PubMed:22536352
PubMed:22384238
PubMed:22321693

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

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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