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CAS 51115-64-1 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 4045902/03/2011

2-METHYLBUTYL BUTYRATE

2-Methylbutyl butanoate

2-METHYLBUTYL BUTYRATE 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.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 51115-64-1

CAS 51115-64-1PubChem CID 162627

Butanoic acid, 2-methylbutyl ester

2-methylbutyl butanoate is a butyrate ester. It is functionally related to a 2-methylbutan-1-ol. — ChEBI

IUPAC name: 2-methylbutyl butanoate

Molecular formula: C9H18O2
Molecular weight: 158.24 g/mol
Exact mass: 158.130679813 Da
XLogP3: 2.6
Topological polar surface area: 26.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

2-Methylbutyl butyrateEINECS 256-973-9WE(4:0(2Me)/4:0)AI3-33702RefChem:571395256-973-92-MethylbutylbutyrateButyric acid (2-methylbutyl) ester

7 more reported names

2-Methylbutyl DutyrateIsoamyl butyrate(kosher)2-Methylbutyl butyrate #CHEBI:1564902-methylbutyl butyrate USP/EP/BPSFE 4:0(2Me)/4:0Natural 2-Methyl Butyl butyrate

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:156490
EPA DTXSID:DTXSID80866181

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 2-METHYLBUTYL BUTYRATE

INCI name

2-METHYLBUTYL BUTYRATE

Description

2-Methylbutyl butanoate

Record provenance

Inventory reference: 40459
Imported identity: 2-METHYLBUTYL BUTYRATE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for 2-METHYLBUTYL BUTYRATE

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Key data

CAS

51115-64-1

256-973-9

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.

#237 · 2-METHYLBUTYL BUTYRATE

Ingredients with overlapping formulation functions

2-METHYL-5-METHYLVINYL-CYCLOHEXANOLPERFUMING

2-METHYLBENZOXAZOLEPERFUMING

2-METHYLBUTANE-2-THIOLPERFUMING

2-METHYLBUTANOLPERFUMING

2-METHYLBUTYL ISOVALERATEPERFUMING

2-METHYLBUTYRALDEHYDEPERFUMING

2-METHYLBUTYRIC ACIDPERFUMING

2-METHYLDODECANALPERFUMING

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 2-METHYLBUTYL BUTYRATE appears in the CosIng inventory

The CosIng inventory lists 2-METHYLBUTYL BUTYRATE 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.

2-METHYLBUTYL BUTYRATE 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

2-METHYLBUTYL BUTYRATE 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, 2-METHYLBUTYL BUTYRATE carries the following function designation(s):

PERFUMING

CAS 51115-64-1 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 2-METHYLBUTYL BUTYRATE

This page reproduces the CosIng inventory entry for 2-METHYLBUTYL BUTYRATE 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 2-METHYLBUTYL BUTYRATE 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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