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AMYLCYCLOPENTENONE.

Questionable CAS 25564-22-1 / PERFUMING

Amylcyclopentenone is a synthetic compound primarily valued for its fragrance and odor-masking properties in cosmetic formulations. It exhibits a jasmine-like scent and is used to enhance the sensory experience of products.

perfuming masking

Science

This ingredient functions mainly as a perfuming and odor-masking agent. Biologically, it's a jasmonate-related compound, with some research indicating potential but limited anti-inflammatory or anti-aging pathways in human skin.


Research

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 New Zealand EPA Cosmetic Products Group Standard
  2. 02 EU Annex III (implied by IFRA standard 108)

Transparency

Commonly dusted

While primarily a fragrance, its limited investigation into anti-aging or anti-inflammatory pathways could lead to it being 'dusted' at low, ineffective concentrations for perceived benefits beyond its primary use. The maximum safe use is 0.1%, but there is no proven efficacious percentage for skin benefits.


The Formula

Solubility
Oil
Optimal pH 1 – 5
0 7 14

Stability

Highly stable in acidic environments (pH 1-5) and alcoholic solutions, making it suitable for acidic hair care formulations. It helps mask base odors effectively.

Conflicts

  • Strong oxidizing agents
  • Strong bases
  • Highly alkaline environments

Safety

CIR Status
Not reviewed
Max tested
0.1%
Sensitization risk High

Prohibited by IFRA for fragrance use due to dermal sensitization (Amendment 43). While regulated for other cosmetic functions in some regions (e.g., NZ EPA) with a max limit of 0.1%, it requires EU labeling if exceeding 0.001% in leave-on and 0.01% in rinse-off products.


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Questionable

Given its high sensitization risk and limited clinically proven skin benefits, Amylcyclopentenone is a questionable ingredient for most precision skincare applications, primarily serving as a fragrance or masking agent at very low, regulated concentrations.


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References