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Moumoujus

T-BUTYL METHACRYLATE.

Avoid CAS 585-07-9 / FILM FORMING

T-Butyl Methacrylate (TBMA) is primarily an industrial monomer used in the synthesis of polymers, imparting properties such as chemical resistance, hardness, and hydrophobicity to various materials. It holds no reported beneficial mechanism of action for the skin and is instead consistently linked to irritation and sensitization.

Summary

Science

Mechanism of Action

This compound acts as a highly reactive methacrylate monomer, forming polymers that enhance material characteristics like durability and resistance. For skin, T-Butyl Methacrylate possesses no recognized beneficial activity; its primary effect is the potential to induce irritation and sensitization upon contact.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

T-Butyl Methacrylate serves as a foundational building block for industrial polymers and is not typically incorporated as an active or functional excipient in precision skincare formulations. Its cosmetic use is strictly confined to applications where direct skin exposure can be prevented.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

To ensure stability and prevent premature polymerization, T-Butyl Methacrylate requires storage under air, not inert gases, as oxygen is essential for the stabilizer (e.g., 200 ppm MEHQ) to function. The storage temperature should not exceed 35 °C, which typically allows for a one-year shelf life. Iron(III)-ions have been observed to act as weak polymerization initiators.

Conflicts

  • Acids (may react exothermically, liberating heat, alcohols, and acids)
  • Strong oxidizing acids (potential for vigorous exothermic reaction and ignition)
  • Caustic solutions (generates heat)
  • Alkali metals and hydrides (generates flammable hydrogen gas)
  • Polymerizable compounds (risk of initiating unwanted polymerization)

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk High

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed T-Butyl Methacrylate safe exclusively for nail enhancement products, provided rigorous avoidance of skin contact due to its significant sensitizing potential. Formulations containing this ingredient must include explicit directives to prevent skin exposure. The FDA's classification relates to indirect food contact substances, not direct cosmetic application.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

T-Butyl Methacrylate offers no demonstrated skin benefits and presents a high risk of irritation and sensitization, rendering it unsuitable for direct topical skincare applications.

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