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Moumoujus

5-METHYL-2-HEPTEN-4-ONE.

Optional CAS 81925-81-7 / PERFUMING

A volatile organic compound that serves as a perfuming agent in cosmetic formulations, delivering a distinctive hazelnut-like aroma. This ketone derivative functions purely as an olfactory enhancer and odor masker, providing sensory appeal without direct skin physiological benefits.

Summary

Perfuming Odor masking

Science

Mechanism of Action

Works exclusively through olfactory receptor interaction to provide fragrance properties. Does not engage in bioactive skin mechanisms such as collagen synthesis, antioxidant activity, or cellular regeneration processes.

Research

Clinical Evidence

Medium confidence
Effective range ≤1%
Optimal

1%

Key findings

  1. 01 Patch testing at 1.0% concentration in petrolatum showed non-irritating and non-sensitizing results in majority of healthy subjects

Transparency

Dusting Analysis

Not commonly dusted

As a fragrance ingredient with established IFRA concentration limits, dusting is uncommon and regulated by industry standards

The Formula

Formulation

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

High volatility requires careful handling; susceptible to oxidation upon air and light exposure. Ketone and alkene structures make it unstable in extreme pH conditions.

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong bases

Safety

Safety Profile

CIR Status
Not reviewed by CIR Panel
Max tested
1%
Sensitization risk Low

FEMA GRAS status (FEMA# 3761) for food applications. IFRA restricts to approximately 1% in leave-on cosmetic products to minimize sensitization potential.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A safe but non-essential fragrance ingredient that adds sensory appeal without contributing to skin health outcomes.

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