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Moumoujus

TRIMETHYL-4,9-DECADIENAL.

Optional CAS 32803-39-7 / PERFUMING

Trimethyl-4,9-decadienal is a synthetic aldehyde primarily valued for its multifaceted aromatic contributions to cosmetic and personal care formulations. It imparts a complex scent profile, offering floral, fruity, aldehydic, and subtly animalic notes that enrich overall fragrance compositions.

Summary

perfuming

Science

Mechanism of Action

This compound functions exclusively as a perfuming agent, interacting with olfactory receptors to evoke a broad spectrum of aromatic sensations. Its molecular structure enables it to contribute diverse scent notes, including powdery, citrus, and waxy sweet undertones, thereby enhancing product aroma.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Optimal stability is achieved by storing in a cool, dry place within tightly sealed containers, protected from direct heat and light, ensuring a shelf life of 24 months or longer. Related decadienals have demonstrated stability across various product types, including alcoholic lotions, shampoos, and soaps, though its aldehyde nature suggests sensitivity to extreme pH environments.

Conflicts

  • heat
  • light
  • extreme pH

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
0.48%
Sensitization risk Moderate

While related compounds have undergone RIFM safety assessments supporting their use without genotoxic, phototoxic, or photoallergenic concerns, specific direct review by CIR, SCCS, or FDA for Trimethyl-4,9-decadienal is not identified. The International Fragrance Association (IFRA) imposes usage restrictions in finished products due to potential dermal sensitization and systemic toxicity. For closely related 'magnolia decadienal' (4,8-dimethyl-4,9-decadienal), limits range from 0.013% in axillary products to 0.48% in rinse-off and leave-on hair products. For (E)-2,5,9-trimethyl-4,9-decadien-1-al (CAS 32803-39-7), IFRA recommends levels up to 2.0000% in fragrance concentrates. PubChem indicates a potential for allergic skin reactions, with a No Expected Sensitization Induction Level (NESIL) of 550 μg/cm² for a related compound. It is listed in the EPA's Substance Registry Services (TSCA).

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

Trimethyl-4,9-decadienal is an optional ingredient valued for its complex perfuming capabilities, yet its application in precision skincare is constrained by its fragrance-only function and moderate risk of dermal sensitization, necessitating strict adherence to IFRA guidelines.

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