Official EU label nameGlossary entry 29544

TROPOLONE

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

0 markets with evidence

Markets checked

Markets with evidence

Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:533-75-5

EC:208-577-2

Ingredient index records:

TROPOLONE

Cosmetic functions: SKIN CONDITIONING

2-Hydroxycyclohepta-2,4,6-trienone; 2-Hydroxytropone

Open full local profile

1 matched or reported name

TROPOLONE

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name TROPOLONE.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

Check the markets and their sources Search every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 533-75-5

CAS 533-75-5PubChem CID 10789

Tropolone

Tropolone is a cyclic ketone that is cyclohepta-2,4,6-trien-1-one substituted by a hydroxy group at position 2. It is a toxin produced by the agricultural pathogen Burkholderia plantarii. It has a role as a fungicide, a toxin and a bacterial metabolite. It is an alpha-hydroxy ketone, an enol and a cyclic ketone. It derives from a hydride of a cyclohepta-1,3,5-triene. — ChEBI

IUPAC name: 2-hydroxycyclohepta-2,4,6-trien-1-one

Molecular formula: C7H6O2
Molecular weight: 122.12 g/mol
Exact mass: 122.036779430 Da
XLogP3: 0.5
Topological polar surface area: 37.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

2-Hydroxycyclohepta-2,4,6-trienonePurpurocatechol2-Hydroxytropone2,4,6-Cycloheptatrien-1-one, 2-hydroxy-7L6DL16P1TNSC-89303CHEBI:79966RefChem:389350

16 more reported names

208-577-22-Hydroxy-2,4,6-cycloheptatrien-1-one2-Hydroxy-2,4,6-cycloheptatrienoneCCRIS 66092-Hydroxy-2,4,6-cycloheptatriene-1-oneAC1614Tropolone, purum, >=98.0% (GC)2-hydroxy-2,4,6-cycloheptatrien -1-onetropolonEINECS 208-577-2NSC 89303BRN 1904978UNII-7L6DL16P1TTropomyosins0TRTropolone, 98%

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:79966
ChEMBL:CHEMBL121188
EPA DTXSID:DTXSID8049416
PubMed:23032214
PubMed:23025237
PubMed:22926028
PubMed:22917559
PubMed:22885403
PubMed:22863449
PubMed:22805928
PubMed:22590003
PubMed:22507316
PubMed:22450442
PubMed:22419431
PubMed:22416696

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

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

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 US EPA CompTox CTX APIs

Take this record further

Screen in a formula Open standalone comparison

Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

Open official Decision