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METHYLOCTYL ACETALDEHYDE.

Questionable CAS 19009-56-4 / PERFUMING

Methyl Octyl Acetaldehyde, also known as 2-Methyldecanal, is a synthetic aldehyde utilized primarily as a perfuming agent. It contributes a distinctive aroma profile to products, characterized by citrus, aldehydic, fatty, and ambergris notes, enhancing the sensory experience.

Fragrance

Science

This ingredient functions exclusively as a perfuming agent, imparting specific olfactory characteristics to cosmetic formulations. It does not exhibit any known direct therapeutic mechanisms or biological activity on the skin itself.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

As a fragrance compound, Methyl Octyl Acetaldehyde is not an active ingredient and thus is not assessed for 'dusting' concerns related to therapeutic efficacy or dosage thresholds on the skin.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Methyl Octyl Acetaldehyde is practically insoluble in water but readily soluble in alcohol, fixed oils, and dipropylene glycol. It maintains stability under mild alkaline conditions. While it shows good stability in body lotions, shampoos, and soaps, its stability is compromised in formulations like antiperspirant roll-ons, citric acid-based cleaners, and bleach. For optimal preservation, storage in a cool, dry place within tightly sealed containers, protected from heat, light, and under a nitrogen atmosphere, is recommended.

Conflicts

  • strong acids
  • strong bases
  • strong oxidizing agents
  • reducing agents

Safety

CIR Status
Not reviewed
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) Expert Panel has not directly assessed Methyl Octyl Acetaldehyde. The European Commission's Scientific Committee on Consumer Safety (SCCS) indicates a lack of available data regarding human contact allergy for this substance. However, it is Generally Recognized as Safe (GRAS) by the US FDA for use as a food additive. The Research Institute for Fragrance Materials (RIFM) has conducted safety assessments, concluding no expected genotoxicity and establishing No Observed Adverse Effect Levels (NOAELs) for repeated dose and developmental toxicity. Its usage as a fragrance ingredient is governed by IFRA standards.


Your Skin

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

Our Assessment

Questionable

As a pure fragrance ingredient with no known direct skin benefits and an unknown profile regarding human contact allergy, irritancy, and comedogenicity, its utility in precision skincare formulations is questionable.


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