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Moumoujus

2-DECENAL.

Optional CAS 3913-71-1 / 3913-81-3 / PERFUMING

2-Decenal is an alpha,beta-unsaturated aldehyde primarily utilized as a masking and fragrance agent in cosmetic formulations. This oily compound delivers a distinctive green, waxy, and citrus-like scent profile while helping to neutralize undesirable base odors in skincare products. As a member of the enal family, it serves a functional role in formulation aesthetics rather than providing direct skin benefits.

Summary

masking perfuming

Science

Mechanism of Action

Functions exclusively as an olfactory modifier, masking unwanted base ingredient odors and contributing pleasant fragrance notes to finished products. Does not interact with skin cellular processes or provide therapeutic effects, but rather enhances the sensory experience of product application through its characteristic green-citrus aromatic profile.

Research

Clinical Evidence

Medium confidence
Effective range ≤0.1%
Optimal

0.1%

Key findings

  1. 01 Maximum recommended usage level of 0.1% in fragrance concentrates established by IFRA/RIFM safety standards to minimize sensitization potential

Transparency

Dusting Analysis

Not commonly dusted

Not typically subject to dusting practices as it serves a specific functional role in fragrance modification rather than being used for marketing appeal

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Demonstrates good stability under standard conditions but requires protection from oxidation due to aldehyde functionality and unsaturated bonds. Commonly stabilized in MCT oil or ethanol carriers to prevent degradation.

Conflicts

  • Strong oxidizing agents
  • Strong bases
  • Primary amines

Safety

Safety Profile

CIR Status
Not reviewed by CIR, evaluated by RIFM and IFRA
Max tested
0.1%
Sensitization risk Moderate

Classified as GHS Skin Irritant Category 2 and Eye Irritant Category 2 in undiluted form. Shows 40% predicted skin absorption with NESIL value of 230 μg/cm². Safety established through fragrance industry standards rather than cosmetic ingredient review.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A functional fragrance ingredient that enhances product sensory experience but offers no direct skin benefits and carries moderate irritation potential.

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