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CAS 87-51-4 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 5671415/10/2010

INDOLE ACETIC ACID

1H-Indole-3-acetic acid

INDOLE ACETIC ACID 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 87-51-4

CAS 87-51-4PubChem CID 802

Indole-3-Acetic Acid

Indole-3-acetic acid is a monocarboxylic acid that is acetic acid in which one of the methyl hydrogens has been replaced by a 1H-indol-3-yl group. It has a role as an auxin, a plant hormone, a mouse metabolite, a plant metabolite and a human metabolite. It is a member of indole-3-acetic acids and a monocarboxylic acid. It is a conjugate acid of an indole-3-acetate. — ChEBI

IUPAC name: 2-(1H-indol-3-yl)acetic acid

Molecular formula: C10H9NO2
Molecular weight: 175.18 g/mol
Exact mass: 175.063328530 Da
XLogP3: 1.4
Topological polar surface area: 53.1 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

3-Indoleacetic acidindoleacetic acidHeteroauxin1H-Indole-3-acetic acid1H-indol-3-ylacetic acidRhizopinRhizopon A3-Indolylacetic acid

16 more reported names

3-Iaa3-(Carboxymethyl)indolebeta-Indoleacetic acidbeta-Indolylacetic acidIndolyl-3-acetic acidindole acetic acidKyselina 3-indolyloctova2-(indol-3-yl)ethanoic acid(indol-3-yl)acetic acidNSC-37876U1S09C61LCHEBI:16411IES cpdRefChem:790975201-748-2Indol-3-ylacetic acid

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:16411
ChEMBL:CHEMBL82411
EPA DTXSID:DTXSID5020738
PubMed:40947077
PubMed:38555004
PubMed:30639138
PubMed:30324315
PubMed:29968805
PubMed:24467709
PubMed:23087694
PubMed:23077481
PubMed:23074908
PubMed:23016493
PubMed:22992509
PubMed:22989740

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 INDOLE ACETIC ACID

INCI name

INDOLE ACETIC ACID

Description

1H-Indole-3-acetic acid

Record provenance

Inventory reference: 56714
Imported identity: INDOLE ACETIC ACID
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for INDOLE ACETIC ACID

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Key data

CAS

87-51-4

201-748-2

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.

Official EU ingredient-name evidence

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

#13533 · INDOLE ACETIC ACID

Ingredients with overlapping formulation functions

INDIGOFERA SUFFRUTICOSA LEAF/STEM EXTRACTSKIN CONDITIONING

INDIGOFERA TINCTORIA LEAF EXTRACTSKIN CONDITIONING

INDIGOFERA TINCTORIA LEAF POWDERSKIN CONDITIONING, SKIN CONDITIONING - MISCELLANEOUS

INDOL ACETYL PHENYLALANINESKIN CONDITIONING

INGA ALBA BARK EXTRACTSKIN CONDITIONING

INGA BOURGONI BARK EXTRACTSKIN CONDITIONING

INGA EDULIS SEED EXTRACTSKIN CONDITIONING

INONOTUS OBLIQUUS EXTRACTSKIN CONDITIONING

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 INDOLE ACETIC ACID appears in the CosIng inventory

The CosIng inventory lists INDOLE ACETIC ACID 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.

INDOLE ACETIC ACID 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

INDOLE ACETIC ACID 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, INDOLE ACETIC ACID carries the following function designation(s):

SKIN CONDITIONING

CAS 87-51-4 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 INDOLE ACETIC ACID

This page reproduces the CosIng inventory entry for INDOLE ACETIC ACID 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 INDOLE ACETIC ACID 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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