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Moumoujus

3,3-DIMETHYL-1,5-DIOXASPIRO-UNDECANE.

Optional CAS 707-29-9 / PERFUMING

A synthetic fragrance molecule that imparts distinctive herbal, thyme-like, leather, and tobacco notes to cosmetic formulations. This spiro-acetal compound serves exclusively as an olfactory ingredient, adding complex aromatic character to skincare and personal care products without providing active skin benefits.

Summary

perfuming

Science

Mechanism of Action

Functions purely as a sensory modifier through olfactory receptors, delivering characteristic herbal and leathery fragrance notes without physiological interaction with skin cells or documented dermatological effects

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

As a fragrance component with no therapeutic claims, dusting is not typically a concern for this ingredient

The Formula

Formulation

Solubility
Oil
Optimal pH 5 – 8
0 7 14

Stability

Vulnerable to hydrolytic breakdown in highly acidic conditions below pH 4.5, which can compromise fragrance integrity by releasing precursor compounds

Conflicts

  • Strong oxidizing agents
  • Strong acids

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

EU CosIng approved for perfuming use with GHS classification indicating potential for skin and eye irritation (H315, H319)

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A specialized fragrance ingredient that adds unique herbal-leather notes but offers no skincare benefits and may irritate sensitive skin.

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