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Moumoujus

ACETALDEHYDE ETHYL HEXYL ACETAL.

Optional CAS 54484-73-0 / PERFUMING

A fragrance component and masking agent that functions as an acetal compound, providing stable olfactory properties in neutral to alkaline formulations. While primarily used for scent enhancement, it serves a practical role in masking unpleasant odors from active ingredients like sulfur compounds.

Summary

perfuming masking

Science

Mechanism of Action

Functions through chemical stability as an acetal compound that remains intact in neutral to alkaline conditions, providing consistent fragrance delivery. In acidic environments, undergoes controlled hydrolysis to release acetaldehyde and alcohols (ethanol and hexanol), which contributes to its masking properties for malodorous ingredients.

Research

Clinical Evidence

Medium confidence
Effective range 0.83–3%
Optimal

3%

Key findings

  1. 01 Human maximization test at 0.83% showed no skin sensitization reactions (RIFM, 1978)
  2. 02 Maximum 3.0% concentration established by IFRA standards for safety in fragrance concentrates

Transparency

Dusting Analysis

Not commonly dusted

Not a commonly dusted ingredient as it serves a functional fragrance purpose rather than marketing appeal

The Formula

Formulation

Solubility
Oil
Optimal pH 6.5 – 9.5
0 7 14

Stability

Highly unstable below pH 5 due to acid-catalyzed hydrolysis. Maintains stability in neutral to alkaline systems and is particularly stable in soap and detergent formulations.

Synergies

  • Mercapto compounds (odor masking)
  • Alkaline actives
  • Soap-based cleansers

Conflicts

  • Strong acids
  • Oxidizing agents
  • Low pH formulations (AHAs, Vitamin C)

Safety

Safety Profile

CIR Status
Not reviewed by CIR
Max tested
3%
Sensitization risk Low

Assessed by RIFM and IFRA with Cramer Class I classification (low toxicity). EFSA and FEMA evaluations for food use show no safety concerns at estimated exposure levels.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A functional fragrance ingredient with good safety profile but limited skincare benefits beyond sensory enhancement.

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