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CAS 20665-85-4 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 4000102/03/2011

4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE

4-Formyl-2-methoxyphenyl 2-Methylpropanoate

4-FORMYL-2-METHOXYPHENYL 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.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 20665-85-4

CAS 20665-85-4PubChem CID 539829

Vanillin isobutyrate

Vanillin isobutyrate is a member of phenols and a benzoate ester. — ChEBI

IUPAC name: (4-formyl-2-methoxyphenyl) 2-methylpropanoate

Molecular formula: C12H14O4
Molecular weight: 222.24 g/mol
Exact mass: 222.08920892 Da
XLogP3: 2.1
Topological polar surface area: 52.6 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

4-Formyl-2-methoxyphenyl isobutyrateIsobutavan4-Formyl-2-methoxyphenyl 2-methylpropanoatePropanoic acid, 2-methyl-, 4-formyl-2-methoxyphenyl esterVanillyl isobutyrateFEMA No. 3754Isobutyric acid, ester with vanillinUNII-C55654RCNR

16 more reported names

3-Methoxy-4-isobutyrylbenzaldehyde4-Hydroxy-m-anisaldehyde isobutyrateEINECS 243-956-64-Isobutyroyloxy-3-methoxybenzaldehydeVANILLIN, ISOBUTYRATE4-Hydroxy-3-methoxybenzaldehyde isobutyrate4-Hydroxy-m-anisaldehyde 2-methylpropionateVANILLIN ISOBUTYRATE [FHFI]4-Hydroxy-3-methoxybenzaldehyde 2-methylpropionateRefChem:193698BGKAKRUFBSTALK-UHFFFAOYSA-NIsobutyric acid 2-methoxy-4-formylphenyl esterISO-JASMONE PURE3-Methoxy-4-(2-methylpropanoyloxy)benzaldehyde(4-formyl-2-methoxy-phenyl) 2-methylpropanoateCHEBI:168997

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:168997
ChEMBL:CHEMBL3188782
EPA DTXSID:DTXSID9047201

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 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE

INCI name

4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE

Description

4-Formyl-2-methoxyphenyl 2-Methylpropanoate

Record provenance

Inventory reference: 40001
Imported identity: 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE

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Key data

CAS

20665-85-4

243-956-6

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.

#328 · 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE

Ingredients with overlapping formulation functions

4-ETHYLGUAIACOLPERFUMING

4-ETHYLOCTA-2,4-DIENOIC ACIDPERFUMING

4-ETHYLOCTANOIC ACIDPERFUMING

4-ETHYLPHENOLPERFUMING

4-METHYL-1-OXASPIRO-4-UNDECANOLPERFUMING

4-METHYL-1-OXASPIROUNDECENEPERFUMING

4-METHYL-1-PHENYL-2-PENTANOLPERFUMING

4-METHYL-2-PHENYL-2-PENTENALPERFUMING

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 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE appears in the CosIng inventory

The CosIng inventory lists 4-FORMYL-2-METHOXYPHENYL 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.

4-FORMYL-2-METHOXYPHENYL 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

4-FORMYL-2-METHOXYPHENYL 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, 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE carries the following function designation(s):

PERFUMING

CAS 20665-85-4 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 4-FORMYL-2-METHOXYPHENYL ISOBUTYRATE

This page reproduces the CosIng inventory entry for 4-FORMYL-2-METHOXYPHENYL 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 4-FORMYL-2-METHOXYPHENYL 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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