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Metaldehyde

CAS 9002-91-9
22

Safety score · 0–100

Caution

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

Metaldehyde is a cosmetic ingredient. Exercise caution due to limited available safety data.

Metaldehyde (CAS 9002-91-9) is a polymer of acetaldehyde used primarily as a molluscicide in agriculture and gardening products. EU Regulation 1223/2009 Annex III restricts its use to concentrations below 0.1% as a constituent of substances or mixtures. While primarily an agricultural chemical, the restriction indicates it may appear as a trace contaminant in natural ingredient formulations. The compound has limited cosmetic applications and poses acute toxicity concerns if ingested, particularly affecting the nervous system.

Known concerns

  • Restricted to <0.1% in EU mixtures
  • Acute toxicity from ingestion (nervous system effects)
  • Primarily an agricultural molluscicide
  • Limited cosmetic utility

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, so always read the physical product label and consult a healthcare professional for personal concerns.