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4-METHYLBENZALDEHYDE

CAS 104-87-0
72

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

Methylbenzaldehyde is a cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.

4-Methylbenzaldehyde (p-tolualdehyde) is an aromatic aldehyde contributing sweet, bitter-almond notes to cosmetic fragrances. The compound is structurally simple, lacking the unsaturated systems that enhance sensitization in related cinnamaldehyde derivatives. EU Regulation 1223/2009 does not restrict this compound under Annex II or III, indicating acceptable safety at current exposure levels. The aldehyde functional group retains mild reactivity, and as with all aldehydes, it may cause irritation in susceptible individuals or at elevated concentrations. The compound occurs naturally in several essential oils and is also naturally present in human metabolism, reducing concerns about foreign-substance toxicity at low cosmetic exposure levels.

Skin benefits

  • Fragrance with pleasant almond-cherry aromatic profile
  • Natural component of several essential oils with established safety

Known concerns

  • Mild skin sensitization potential
  • Aldehyde reactivity may cause irritation at high concentration
  • EU allergen labeling applies depending on source and concentration
  • Standard cosmetic safety assessment required

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.