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Moumoujus

DECENAL.

Optional CAS 65405-70-1 / 21662-09-9 / 30390-50-2 / FRAGRANCE, PERFUMING

Decenal is an aliphatic aldehyde primarily utilized in cosmetic formulations for its distinct sensorial properties, imparting waxy, citrus-like, or floral aromas. While broader contexts suggest some antimicrobial and anti-inflammatory attributes, its direct efficacy for specific skin benefits remains largely unsubstantiated in available research, indicating a predominantly sensorial role.

Summary

Fragrance Ingredient Masking Agent

Science

Mechanism of Action

Decenal functions predominantly as a perfuming and masking agent within cosmetic matrices. Its molecular structure allows it to contribute distinct waxy, citrus-like, or floral aromatic profiles, effectively enhancing the sensorial experience of a product or obscuring undesirable base odors. Direct biochemical mechanisms conferring specific therapeutic benefits to the skin are not well-established in current scientific literature.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Decenal's function is primarily olfactory; there is no indication that it is an ingredient commonly associated with exaggerated claims or 'dusting' in the skincare industry.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

2-Decenal is largely insoluble in water (approximately 68 mg/L at 25°C) but readily dissolves in ethanol, ether, and most fixed oils. (E)-4-decenal demonstrates good stability in alcohol, soap, and formulations at pH 10. Its stability is moderate at pH 2 and in dry fabric conditions. However, it exhibits poor stability when exposed to strong oxidizing agents, such as liquid bleach, and certain antiperspirant ingredients.

Conflicts

  • strong oxidizing agents
  • certain antiperspirant ingredients

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Unknown

No specific Cosmetic Ingredient Review (CIR) or Scientific Committee on Consumer Safety (SCCS) assessments for decenal in cosmetic use were found. 2-Decenal (trans-2-Decenal) is Generally Recognized As Safe (GRAS) by the U.S. FDA for its use as a flavoring agent. The Research Institute for Fragrance Materials (RIFM) assessed 2-decenal, finding it positive for cytotoxicity without metabolic activation in a BlueScreen assay, but negative with metabolic activation, and negative for genotoxicity. It is not classified as Persistent, Bioaccumulative, and Toxic (PBT). Under the Modernization of Cosmetics Regulation Act (MoCRA), the responsible person must substantiate the safety of cosmetic ingredients.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

Decenal primarily serves as a sensorial additive to impart specific aromatic notes and mask odors, offering no direct, substantiated skincare benefits according to current research.

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