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Moumoujus

5-METHYL-1-(2,2,3-TRIMETHYLCYCLOPENTENYL)-6-OXABICYCLOOCTANE.

Optional CAS 139539-66-5 / PERFUMING

A synthetic cyclic ether fragrance compound known commercially as Cassiffix®, designed to deliver a distinctive blackcurrant (cassis) scent profile in cosmetic formulations. This substantive molecule provides exceptional longevity (24+ hours) and stability compared to traditional sulfur-based fruity fragrances, making it valuable for masking unwanted odors in skincare products.

Summary

perfuming masking

Science

Mechanism of Action

Functions as both a masking and perfuming agent by interacting with olfactory receptors to provide long-lasting fruity, green notes. Its cyclic ether structure and high lipophilicity (logP ~3.66) allow it to bind effectively to skin and hair surfaces, creating sustained fragrance release without the instability issues common to sulfur-containing cassis compounds.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–5%
Optimal

0.23%

Key findings

  1. 01 IFRA standards establish maximum 5% concentration in fragrance concentrates
  2. 02 Market analysis shows typical usage at 0.1-0.23% in finished cosmetic products

Transparency

Dusting Analysis

Not commonly dusted

This is a specialized fragrance ingredient used at precise concentrations rather than dusted for marketing purposes

The Formula

Formulation

Solubility
Oil
Optimal pH 4 – 9
0 7 14

Stability

Exceptionally stable across various formulation bases including soaps, detergents, and antiperspirants. Superior stability compared to sulfur-based fruity compounds with minimal off-note development.

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong alkalis

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
5%
Sensitization risk Low

Classified as skin and eye irritant (H315, H319) in concentrated form. IFRA regulated with category-specific usage limits. OECD 406 testing indicates no known sensitization potential.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A specialized fragrance ingredient that serves its masking and perfuming functions effectively, though offers no direct skin benefits beyond sensorial enhancement.

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