What does the restriction note for AMYLCYCLOPENTENONE mean?

The restriction field for AMYLCYCLOPENTENONE reads: III/153. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What other records share CAS 25564-22-1?

CAS 25564-22-1 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.

How do I check if my formula contains AMYLCYCLOPENTENONE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3903715/10/2010

AMYLCYCLOPENTENONE

2-Pentylcyclopent-2-en-1-one

AMYLCYCLOPENTENONE is linked to 1 EU annex record on this page. Inventory note: III/153.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Restricted entry found Open this evidence	1	English and EU languages
Great Britain	Evidence linked Restricted Open this evidence	1	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Evidence linked Restricted Open this evidence	1	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Evidence linked Restricted Open this evidence	1	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Evidence linked Restricted Open this evidence	1	English and Hindi
Saudi Arabia	Evidence linked Restricted Open this evidence	1	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 25564-22-1

CAS 25564-22-1PubChem CID 117549

2-Cyclopenten-1-one, 2-pentyl-

IUPAC name: 2-pentylcyclopent-2-en-1-one

Molecular formula: C10H16O
Molecular weight: 152.23 g/mol
Exact mass: 152.120115130 Da
XLogP3: 3.0
Topological polar surface area: 17.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

2-Pentyl-2-cyclopenten-1-oneAmyl cyclopentenoneBRN 1857975EINECS 247-104-41UOK9N9N72EC 247-104-44-07-00-00195 (Beilstein Handbook Reference)2Pentylcyclopent2en1one

16 more reported names

RefChem:4709702Cyclopenten1one, 2pentyl247-104-42-Pentyl-2-Cyclopentene-1-One2-pentyl-2-cyclopentenone2-pentylcyclopent-2-enone2-pentyl-cyclopent-2-en-1-oneCAS-25564-22-1UNII-1UOK9N9N722-pentyl-cyclopent-2-enone2-n-pentyl-2-cyclopentenone2-Amyl 2-cyclopenten-1-one2-n-pentyl-cyclopent-2-en-1-oneTox21_201738Tox21_303448VS-02198

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEMBL:CHEMBL3183509
EPA DTXSID:DTXSID6029331

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for AMYLCYCLOPENTENONE

INCI name

AMYLCYCLOPENTENONE

Description

2-Pentylcyclopent-2-en-1-one

Record provenance

Inventory reference: 39037
Imported identity: AMYLCYCLOPENTENONE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for AMYLCYCLOPENTENONE

Annex III Restriction reference

Entry 153

Amylcyclopentenone

CAS: 25564-22-1

EC: 247-104-4

Key data

CAS

25564-22-1

247-104-4

Restriction

III/153

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.

#1899 · AMYLCYCLOPENTENONE

Ingredients with overlapping formulation functions

AMYLCINNAMAL/METHYL ANTHRANILATE SCHIFF BASEPERFUMING

AMYLCINNAMYL ACETATEPERFUMING

AMYLCINNAMYL ALCOHOLPERFUMING

AMYLCYCLOPENTANONEPERFUMING

AMYLFURANPERFUMING

AMYLISOEUGENOLPERFUMING

AMYLVINYL CARBINOLPERFUMING

AMYLVINYLCARBINYL ACETATEPERFUMING

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 AMYLCYCLOPENTENONE appears in the CosIng inventory

The CosIng inventory lists AMYLCYCLOPENTENONE as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

AMYLCYCLOPENTENONE 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

AMYLCYCLOPENTENONE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for AMYLCYCLOPENTENONE reads: "III/153". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, AMYLCYCLOPENTENONE carries the following function designation(s):

PERFUMING

CAS 25564-22-1 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 AMYLCYCLOPENTENONE

This page combines the CosIng inventory entry for AMYLCYCLOPENTENONE with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research AMYLCYCLOPENTENONE 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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Tools & next steps

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