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Restricted nail monomer

HEMA

CAS 868-77-9
32

Safety score · 0–100

Caution

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

A small methacrylate monomer used in gel and acrylic nail products. It is a leading cause of allergic reactions in nail technicians and clients, which has prompted strict EU regulation since 2020.

Skin benefits

  • Methacrylate monomer that helps cure gel nail polish for long-lasting wear
  • Provides strong adhesion in artificial nail systems

Known concerns

  • Major cause of nail-related allergic contact dermatitis
  • EU restricted to professional nail-product use only since 2020; further bans on certain gel polishes from 2025
  • Small molecule that penetrates skin readily, increasing sensitization risk
  • Once sensitized, reactions can persist with future exposure

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.