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METHYL CYCLOPENTYLIDENEACETATE.

Optional CAS 40203-73-4 / PERFUMING

Methyl Cyclopentylideneacetate is a synthetic aromatic compound, primarily valued for imparting a potent floral scent reminiscent of white flowers such as tuberose and ylang-ylang. It functions exclusively as a fragrance component, enhancing the diffusion and lift within cosmetic and personal care formulations.

perfuming

Science

This ingredient operates by releasing volatile aromatic molecules, which are perceived as a powerful and diffusive floral aroma. Its sole mechanism of action in formulations is to provide a specific olfactive profile, contributing to the sensory experience without exerting direct biological activity on the skin.


Research

Low confidence
Effective range 0.01–1%
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Methyl Cyclopentylideneacetate exhibits robust stability across a broad spectrum of product categories, including fine fragrances, shampoos, shower gels, soaps, detergents, softeners, all-purpose cleaners, and candles. Optimal stability is maintained within recommended concentrations ranging from 0.01% to 1%, with particular stability noted in shower gels and soaps at 0.75% to 1%.


Safety

CIR Status
Not reviewed
Max tested
1%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel typically does not review ingredients functioning solely as fragrances; their safety is evaluated by the Research Institute for Fragrance Materials (RIFM). RIFM has conducted a peer-reviewed safety assessment of Methyl Cyclopentylideneacetate, concluding it is safe for use in everyday products at current levels. Data indicates no genotoxic, phototoxic, or photoallergenic potential. No safety concerns regarding skin sensitization have been identified under current, declared usage levels.


Your Skin

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

Our Assessment

Optional

Methyl Cyclopentylideneacetate is an optional ingredient, valued for its potent white floral fragrance profile and its ability to enhance fragrance diffusion in cosmetic formulations, with no direct efficacy for skin benefits.


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