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2-ETHYL-1,3,3-TRIMETHYLBICYCLO[2.2.1]HEPTAN-2-OL.

Optional CAS 18368-91-7 / PERFUMING

A potent fragrance compound known commercially as Terrasol, delivering distinctive earthy and camphoraceous scent notes at remarkably low concentrations. This bicyclic alcohol serves exclusively as a perfuming agent in skincare formulations, with no documented skin-specific biological activity.

perfuming masking agent

Science

Functions as an olfactory receptor ligand targeting the OR11A1 receptor, providing fragrance enhancement without direct biochemical interaction with skin cells or dermal processes such as collagen synthesis or cellular regeneration.


Research

Medium confidence
Effective range 0.0001–2.5%
Optimal

0.1%

Key findings

  1. 01 Demonstrated significant individual variation in odor perception based on OR11A1 receptor polymorphisms in olfactory research applications

Transparency

Not commonly dusted
Min. effective
0.01%
Red flag below
0.1%

Due to extreme potency, concentrations above 0.1% may indicate unnecessary oversaturation for fragrance purposes, though regulatory limits allow up to 2.5%


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Demonstrates excellent stability across diverse formulation bases including alkaline detergent systems; insoluble in aqueous phases but highly compatible with alcoholic and lipophilic vehicles

Synergies

  • alcohols
  • cosmetic oils
  • lipophilic fragrance carriers

Conflicts

  • nitrosating agents

Safety

CIR Status
Not reviewed
Max tested
2.5%
Pregnancy
Safe
Sensitization risk Low

Recognized as GRAS for food applications (FEMA 3491) and listed in EU cosmetic ingredient inventory; typically used in trace amounts due to high potency


Your Skin

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

Our Assessment

Optional

A specialized fragrance ingredient with no skincare benefits beyond olfactory enhancement, suitable for non-sensitive skin when odor modification is desired.


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