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1-NONEN-3-OL.

Optional CAS 21964-44-3 / PERFUMING

An unsaturated fatty alcohol primarily recognized as a fragrance component that delivers distinctive green, earthy notes to formulations. Beyond its olfactory contributions, this C9 compound demonstrates tyrosinase inhibition properties that may influence melanin production pathways. Research suggests potential antioxidant activity, though its skincare applications remain largely secondary to its fragrance function.

fragrance antioxidant tyrosinase inhibitor

Science

Functions primarily through tyrosinase enzyme inhibition, potentially moderating melanin synthesis while providing mild antioxidant protection. As an unsaturated alcohol, it integrates into lipid matrices and may offer gentle antiseptic properties through disruption of microbial cell membranes.


Research

Low confidence
Effective range 0.1–20%
Optimal

1%

Key findings

  1. 01 Demonstrated tyrosinase inhibitory activity as component of essential oil blend at 0.1-1.0 mg/mL concentrations

Transparency

Not commonly dusted

Primarily used as fragrance ingredient rather than active skincare component, making dusting unlikely in typical cosmetic applications


The Formula

Solubility
Oil
Optimal pH 6.5 – 8.5
0 7 14

Stability

Demonstrates excellent stability in alcoholic and lipophilic systems with limited water solubility (0.14-0.18 g/L). Maintains optimal performance in neutral to mildly alkaline conditions.

Synergies

  • alcoholic solvents
  • lipid carriers
  • neutral pH buffers

Conflicts

  • strong oxidizing agents
  • highly acidic environments

Safety

CIR Status
Not reviewed
Max tested
2%
Sensitization risk Moderate

Recognized as safe fragrance material under IFRA guidelines up to 2% in concentrates. Potential for irritation and allergic responses exists at elevated concentrations, consistent with related unsaturated alcohol compounds.



Our Assessment

Optional

Acceptable fragrance ingredient with modest tyrosinase inhibition potential, but insufficient evidence supports its use as primary skincare active.


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