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3-CARENE.

Valuable CAS 13466-78-9 / PERFUMING

A naturally-derived monoterpene hydrocarbon that functions primarily as a penetration enhancer by disrupting the stratum corneum's lipid barrier. This bicyclic terpene demonstrates the highest enhancement ratio among studied hydrocarbons while providing secondary antimicrobial benefits through membrane disruption mechanisms.

penetration enhancer perfuming antimicrobial

Science

Alters intercellular lipid organization within the stratum corneum to increase permeability of other actives. Simultaneously disrupts microbial cell membranes by reducing phospholipid content and membrane fluidity, while generating reactive oxygen species that compromise pathogenic organisms.


Research

Medium confidence
Effective range 0.1–1%
Optimal

1%

Key findings

  1. 01 Enhanced lipophilic drug penetration with superior performance versus other hydrocarbons at 0.1-1.0% concentrations (Int J Pharm 1993, J Control Release 1998)
  2. 02 Demonstrated antibacterial activity against Pseudomonas fragi and Candida species through membrane disruption (MDPI 2023)

Transparency

Not commonly dusted

Primarily used as specialized penetration enhancer in therapeutic formulations rather than marketing ingredient


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Prone to polymerization under oxidative stress conditions. Requires nitrogen atmosphere storage and refrigeration to maintain integrity.

Synergies

  • lipophilic actives requiring enhanced penetration

Conflicts

  • strong oxidizing agents
  • highly acidic formulations
  • highly alkaline formulations

Safety

CIR Status
Not reviewed
Max tested
1%
Sensitization risk Low

RIFM 2018 assessment confirms no skin sensitization concerns at typical usage levels below 1%. Pure form classified as irritant; EU restrictions apply to inhalable applications due to respiratory irritation potential.


Your Skin

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

Our Assessment

Valuable

Highly effective penetration enhancer with proven superiority over alternatives, though limited to non-sensitive skin applications due to moderate irritancy profile.


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