T-BUTYL METHACRYLATE

Film Former

45

Caution

CAS Number: 585-07-9

About T-BUTYL METHACRYLATE

A film-forming methacrylate monomer structurally similar to isobutyl methacrylate, with documented skin sensitization potential. Not individually listed in EU cosmetic Annexes but restricted as a sensitizing impurity.

Detailed Analysis

tert-Butyl methacrylate is a polymerizable methacrylate ester. Like other alkyl methacrylates, it is classified as a skin sensitizer under CLP regulation. While not specifically banned in EU cosmetics, the SCCS notes that residual monomers of this class are restricted due to allergenic concerns, particularly in leave-on nail and skin products.

What It Does

FILM FORMING

Skin Benefits

  • ✓ Film former in nail and coating formulations
  • ✓ Contributes to durable polymer networks

Known Concerns

  • ⚠ Documented skin sensitizer
  • ⚠ Restricted as residual monomer in cosmetic polymers
  • ⚠ CLP classification: Skin Sens. 1

Safety Score

45

Caution

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

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EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.