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CAS 2050-01-3 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 4031802/03/2011

ISOAMYL ISOBUTYRATE

3-Methylbutyl 2-Methylpropanoate

ISOAMYL ISOBUTYRATE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 2050-01-3

CAS 2050-01-3PubChem CID 519786

Isoamyl isobutyrate

Isoamyl isobutyrate is a fatty acid ester obtained by the formal condensation of isoamylol with isobutyric acid. It has a role as a metabolite. It is functionally related to an isoamylol and an isobutyric acid. — ChEBI

IUPAC name: 3-methylbutyl 2-methylpropanoate

Molecular formula: C9H18O2
Molecular weight: 158.24 g/mol
Exact mass: 158.130679813 Da
XLogP3: 2.8
Topological polar surface area: 26.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Isopentyl isobutyratePropanoic acid, 2-methyl-, 3-methylbutyl ester3-Methylbutyl isobutyrateIsoamyl 2-methylpropanoateIsobutyric acid, isopentyl esterIsopentyl 2-methylpropanoate3-Methyl-1-butyl isobutyrateIsopentyl alcohol, isobutyrate

16 more reported names

RF0ZT103EGFEMA No. 3507CHEBI:87537RefChem:791549218-078-1Isoamyl isobutanoateIsopentyl isobutanoate3-Methylbutyl 2-methylpropionateIsobutyric Acid Isoamyl EsterWE(4:0(3Me)/3:0(2Me))iso-Amyl iso-butyrateIso Amyl Iso ButyrateUNII-RF0ZT103EGIsopentyl 2-methylpropanoate #FEMA 3507ISOAMYL ISOBUTYRATE [FCC]

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External database identifiers

ChEBI:CHEBI:87537
EPA DTXSID:DTXSID0062131
PubMed:17760990
PubMed:17633428

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

Inventory details for ISOAMYL ISOBUTYRATE

INCI name

ISOAMYL ISOBUTYRATE

Description

3-Methylbutyl 2-Methylpropanoate

Record provenance

Inventory reference: 40318
Imported identity: ISOAMYL ISOBUTYRATE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for ISOAMYL ISOBUTYRATE

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Key data

CAS

2050-01-3

218-078-1

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#13653 · ISOAMYL ISOBUTYRATE

Ingredients with overlapping formulation functions

ISOAMYL FORMATEPERFUMING

ISOAMYL GERANATEPERFUMING

ISOAMYL HEPTANOATEPERFUMING

ISOAMYL HEXANOATEPERFUMING

ISOAMYL ISOVALERATEPERFUMING

ISOAMYL OCTANOATEPERFUMING

ISOAMYL PHENETHYL ETHERPERFUMING

ISOAMYL PHENYLACETATEPERFUMING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox 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

How ISOAMYL ISOBUTYRATE appears in the CosIng inventory

The CosIng inventory lists ISOAMYL ISOBUTYRATE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

ISOAMYL ISOBUTYRATE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

ISOAMYL ISOBUTYRATE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, ISOAMYL ISOBUTYRATE carries the following function designation(s):

PERFUMING

CAS 2050-01-3 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for ISOAMYL ISOBUTYRATE

This page reproduces the CosIng inventory entry for ISOAMYL ISOBUTYRATE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research ISOAMYL ISOBUTYRATE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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