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3-HEPTANOL.

Valuable CAS 589-82-2 / PERFUMING

A secondary fatty alcohol that functions as a sophisticated penetration enhancer, facilitating deeper delivery of active ingredients by disrupting the skin's lipid barrier. While primarily recognized in fragrance applications, this medium-chain alkanol demonstrates notable efficacy in enhancing the bioavailability of topical formulations.

Penetration enhancer Solvent Fragrance component

Science

Partitions into stratum corneum lipids to increase membrane fluidization, specifically targeting the lipoidal pathway to reduce skin resistance and enable enhanced penetration of both polar and non-polar molecules through the epidermal barrier.


Research

Medium confidence
Effective range 0.1–0.2%
Optimal

0.2%

Key findings

  1. 01 Chantasart et al. (2004) demonstrated significant skin permeation enhancement properties through stratum corneum lipid disruption
  2. 02 Pharmaceutical analysis studies validated its use at 1.0% as a penetration marker in dermatological VOC profiling

Transparency

Not commonly dusted

Not commonly used as marketing dust due to its functional role as a penetration enhancer rather than a headline active ingredient


The Formula

Solubility
Oil
Optimal pH 4 – 7.5
0 7 14

Stability

Exhibits high stability as a secondary alcohol with resistance to oxidation, though requires sealed storage to prevent evaporation due to volatility at 156°C boiling point

Synergies

  • AHA/BHA exfoliants
  • Essential oil complexes
  • Lipophilic active ingredients

Conflicts

  • Strong oxidizing agents
  • Strong acids

Safety

CIR Status
Not reviewed by CIR
Max tested
0.2%
Sensitization risk Low

IFRA 49th Amendment limits concentration to 0.2% in fragrance applications; FDA recognizes as GRAS for food use (FEMA 3547)


Your Skin

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

Our Assessment

Valuable

A scientifically-backed penetration enhancer that optimizes active ingredient delivery at low concentrations with minimal irritation risk.


Related

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References