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M-TOLUALDEHYDE.

Avoid CAS 620-23-5 / PERFUMING

M-Tolualdehyde is an aromatic aldehyde primarily incorporated into cosmetic formulations as a perfuming agent. Current research indicates no direct beneficial mechanisms for skin application, and its safety profile raises significant concerns regarding irritation.

Science

As an aromatic aldehyde, M-Tolualdehyde's interaction with skin does not currently demonstrate direct cosmetic benefits. Animal studies have indicated its potential to act as an inhibitory metabolite, influencing cytochrome P-450 isozymes in pulmonary and nasal mucosa in a dose-dependent manner. Aldehydes, including M-Tolualdehyde, are generally susceptible to oxidation, converting into organic acids.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

M-Tolualdehyde is a combustible and air-sensitive liquid, commonly stabilized with an antioxidant such as 0.1% hydroquinone to maintain integrity. Optimal storage conditions require a well-ventilated, cool, dark environment within a tightly sealed container. While a specific pH range for stability in skincare formulations is not documented, general cosmetic products typically operate within a pH of 4.5 to 6.5.

Conflicts

  • strong oxidizing agents
  • strong bases
  • strong reducing agents

Safety

CIR Status
Not reviewed
Sensitization risk High

M-Tolualdehyde has not undergone direct safety review by the Cosmetic Ingredient Review (CIR) Expert Panel or the SCCS. Safety Data Sheets (SDS) uniformly classify this ingredient as harmful if ingested, and it is documented to cause skin irritation, serious eye irritation, and potential respiratory irritation. European hazard information corroborates its irritating effects. Although sometimes listed as a fragrance agent in cosmetics, certain SDS specifically advise against its use in food, drug, pesticide, or biocidal applications due to its hazard profile.


Your Skin

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

Our Assessment

Avoid

Due to a complete absence of demonstrated skin benefits and a high risk of irritation as indicated by safety data, M-Tolualdehyde is not recommended for precision skincare formulations.


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