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Annex III Entry 164 23/05/2013

ROSE KETONE-5

Rose ketone-5 (see note 16) 1-(2,4,4-Trimethyl-2-cycloehexen-1-yl)-2-buten-1-one

ROSE KETONE-5 is listed in Annex III and may only be used under the conditions shown in this record. Maximum concentration in this record: 0.02%.

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Restricted substance— Annex III, EU Regulation 1223/2009
Max conc.: 0.02%
Entry: 164

Chemical identity and properties

PubChem 2D chemical structure for CAS 33673-71-1
CAS 33673-71-1PubChem CID 118097

2-Buten-1-one, 1-(2,4,4-trimethyl-2-cyclohexen-1-yl)-

IUPAC name
1-(2,4,4-trimethylcyclohex-2-en-1-yl)but-2-en-1-one
Molecular formula
C13H20O
Molecular weight
192.30 g/mol
Exact mass
192.151415257 Da
XLogP3
3.3
Topological polar surface area
17.1 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

2-Buten-1-one, 1-(2,4,4-trimethyl-2-cyclohexen-1-yl)-, (2E)-NELDPSDYTZADSA-UHFFFAOYSA-N
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External database identifiers

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

Record details

Maximum concentration

0.02%

INCI glossary name

ROSE KETONE-5

Chemical name

Rose ketone-5 (see note 16) 1-(2,4,4-Trimethyl-2-cycloehexen-1-yl)-2-buten-1-one

Regulatory information

Regulation

(EC) 2013/344

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SCCS opinions

Identified ingredients

Key data

CAS
33673-71-1
EC
251-632-0
Annex
III
Entry number
164

Inventory links for ROSE KETONE-5

Inventory Restriction reference
Ref 41493

ROSE KETONE-5

CAS: 33673-71-1
EC: 251-632-0

Direct matches are limited for this record, so nearby entries from Annex III are shown as well.

Annex III 166
Nearby record in the same annex

TRANS-2-HEXENAL

CAS: 6728-26-3
EC: 229-778-1
Annex III 169
Nearby record in the same annex

PERILLALDEHYDE

CAS: 2111-75-3
EC: 218-302-8
Annex III 170
Nearby record in the same annex

ISOBERGAMATE

CAS: 68683-20-5
EC: 272-066-0
Annex III 171
Nearby record in the same annex

SCENTENAL

CAS: 86803-90-9

What Annex III means for ROSE KETONE-5

ROSE KETONE-5 is a restricted substance under Annex III of EU Cosmetics Regulation 1223/2009. Its use in cosmetics is only permitted under the specific conditions set out in the entry above, including applicable concentration limits, product type restrictions and required warning statements.

When including this substance in a formulation, all conditions — maximum concentration, product scope and warning labels — must be met simultaneously. Compliance with one condition does not override the others.

This record is linked to 1 CosIng inventory ingredient for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Ensure formulation concentration does not exceed: 0.02%
  • Document conditions of use in the Product Information File (PIF).

Frequently asked questions

ROSE KETONE-5 is listed in Annex III of EU Regulation 1223/2009 as a restricted substance. It may only be used under the conditions specified in the entry, including any maximum concentration, product type limitation and required warning statements shown above.

CAS 33673-71-1 is the unique numerical identifier assigned to ROSE KETONE-5 by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

The maximum concentration of 0.02% applies to the concentration of the substance in the ready-to-use cosmetic product. When the substance is supplied as part of a blend or mixture, the calculation must account for the contribution of all sources in the formulation. The combined concentration must not exceed the stated limit.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex III record ROSE KETONE-5

This page summarizes one Annex III record for ROSE KETONE-5 from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex III conditions for ROSE KETONE-5, but confirm any final regulatory decision against the current official annex wording and source files.

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