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3,5,6-TRIMETHYL-3-CYCLOHEXENE-1-CARBALDEHYDE.

Optional CAS 67634-07-5 / PERFUMING

An aromatic aldehyde fragrance ingredient that delivers floral, green, and herbal scent notes to cosmetic formulations. This oil-soluble compound functions purely as a perfuming agent with no therapeutic skin benefits beyond its olfactory properties.

perfuming

Science

Works exclusively through olfactory stimulation to enhance product sensory experience, with minor solvent properties that may aid in formula compatibility but no direct biological activity on skin cells.


Research

Medium confidence
Effective range 0.1–1%
Optimal

0.1%

Key findings

  1. 01 RIFM safety assessment established No Expected Sensitization Induction Level of 1000 µg/cm², validating safe use at low concentrations

Transparency

Not commonly dusted

As a fragrance component with sensitization potential, concentrations are naturally kept minimal in most formulations


The Formula

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Vulnerable to oxidation when exposed to air and light, converting to corresponding carboxylic acids; requires airtight packaging and antioxidant protection

Synergies

  • BHT
  • Tocopherol

Conflicts

  • Strong oxidizing agents
  • Strong bases
  • Primary amines

Safety

CIR Status
Not reviewed
Max tested
1%
Sensitization risk Moderate

Regulated under IFRA standards; commercial products typically use concentrations below 0.1% to minimize allergic reaction risk


Your Skin

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

Our Assessment

Optional

A functional fragrance ingredient with moderate sensitization risk that serves purely aesthetic purposes without skincare benefits.


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