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CAS 2432-91-9 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 3914402/03/2011

TERT-BUTYL ISOPENTANETHIOATE

tert-Butyl 3-methylbutanethioate

TERT-BUTYL ISOPENTANETHIOATE 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 2432-91-9

CAS 2432-91-9PubChem CID 102815

Butanethioic acid, 3-methyl-, S-(1-methylpropyl) ester

IUPAC name: S-butan-2-yl 3-methylbutanethioate

Molecular formula: C9H18OS
Molecular weight: 174.31 g/mol
Exact mass: 174.10783637 Da
XLogP3: 3.2
Topological polar surface area: 42.4 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

sec-Butyl thioisovalerateS-sec-Butyl 3-methylbutanethioateS-sec-Butyl thioisovaleratesec-Butyl 3-methylbutanethioateS-sec-ButylthioisovalerateS-1-Methylpropyl 3-methylbutanethioateEINECS 219-416-0RefChem:571299

6 more reported names

219-416-0S-(1-Methylpropyl) 3-methylbutanethioate3-methylbutanethioic acid S-butan-2-yl esterS-(Butan-2-yl) 3-methylbutanethioateS-(Sec-butyl) 3-methylbutanethioate #Butyric acid, 3-methy,lthio-, S-sec-butyl ester

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External database identifiers

EPA DTXSID:DTXSID80862941

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 TERT-BUTYL ISOPENTANETHIOATE

INCI name

TERT-BUTYL ISOPENTANETHIOATE

Description

tert-Butyl 3-methylbutanethioate

Record provenance

Inventory reference: 39144
Imported identity: TERT-BUTYL ISOPENTANETHIOATE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for TERT-BUTYL ISOPENTANETHIOATE

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Key data

CAS

2432-91-9

219-416-0

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

TERPINYL PROPIONATEPERFUMING

TERT-AMYLCYCLOHEXANOLPERFUMING

TERT-BUTYL DIMETHYL ACETOPHENONEPERFUMING

TERT-BUTYL ISOPENT-2-ENTHIOATEPERFUMING

TERT-BUTYLHYDROQUINONE DIMETHYLETHERPERFUMING

TERT-BUTYLQUINOLINEPERFUMING

TETRADECANEPERFUMING

TETRAHYDRO-2-ISOBUTYL-4-METHYL-2H-PYRANPERFUMING

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 TERT-BUTYL ISOPENTANETHIOATE appears in the CosIng inventory

The CosIng inventory lists TERT-BUTYL ISOPENTANETHIOATE 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.

TERT-BUTYL ISOPENTANETHIOATE 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

TERT-BUTYL ISOPENTANETHIOATE 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, TERT-BUTYL ISOPENTANETHIOATE carries the following function designation(s):

PERFUMING

CAS 2432-91-9 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 TERT-BUTYL ISOPENTANETHIOATE

This page reproduces the CosIng inventory entry for TERT-BUTYL ISOPENTANETHIOATE 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 TERT-BUTYL ISOPENTANETHIOATE 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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