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3,4-DIHYDRO-6-METHYLNAPHTHALENONE.

Optional CAS 51015-29-3 / PERFUMING

A bicyclic aromatic ketone primarily employed as a fragrance component in cosmetic formulations. Beyond its olfactory function, research suggests modest bacteriostatic properties against common skin microorganisms at concentrations as low as 0.05%.

Perfuming Antimicrobial

Science

Functions primarily through aromatic molecular diffusion to provide fragrance properties. Secondary antimicrobial activity occurs through disruption of bacterial cell membrane integrity, particularly effective against Staphylococcus aureus and Corynebacterium species.


Research

Low confidence
Effective range ≥0.05%
Optimal

0.05%

Key findings

  1. 01 Demonstrated bacteriostatic activity against S. aureus and lipophilic diphtheroids in fragrance material screening

Transparency

Not commonly dusted

As a specialty fragrance component with limited skincare applications, dusting is uncommon due to its specific aromatic profile and medium irritancy potential


The Formula

Solubility
Oil
Optimal pH 4.5 – 7
0 7 14

Stability

Exhibits enhanced UV absorption under acidic conditions below pH 4.5, potentially increasing photosensitivity risk. Maintains stability in neutral to mildly acidic environments.

Conflicts

  • Strong oxidizing agents
  • Formulations below pH 4.5

Safety

CIR Status
Not reviewed
Sensitization risk Moderate

Classified as harmful if ingested (H302) and serious eye irritant (H319) in concentrated form. EU CosIng approved for perfuming applications.


Your Skin

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

Our Assessment

Optional

A specialized fragrance ingredient with modest antimicrobial benefits but limited broader skincare applications due to moderate irritancy.


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