Science
Mechanism of Action
Functions as a reactive ester monomer that polymerizes to form flexible, protective films on surfaces. When in contact with skin, it undergoes enzymatic hydrolysis by carboxylesterases to produce methacrylic acid, while its potential for covalent protein binding creates hapten formation leading to sensitization responses.
Research
Clinical Evidence
High confidence1%
Key findings
- 01 4-hour occluded patch testing at 100% concentration showed significant erythema (2.3/4.0 scale) with effects lasting 14 days
- 02 Consumer exposure modeling identified 1% as the threshold for long-term local effects and sensitization risk
Transparency
Dusting Analysis
Regulatory restrictions limit use to nail products with skin contact avoidance, making dusting practices inappropriate for this sensitizing ingredient.
The Formula
Formulation
Stability
Requires polymerization inhibitors like hydroquinone and oxygen headspace to prevent spontaneous curing. Exhibits high reactivity with exothermic potential under acidic or oxidizing conditions.
Conflicts
- Strong oxidizing agents
- Strong acids
- Caustic solutions
- Alkali metals
- UV light
Safety
Safety Profile
CIR approval limited to nail enhancement products only with mandatory skin contact avoidance due to potent sensitization potential in monomeric form.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Restricted to specialized nail applications due to high irritation and sensitization potential that makes it unsuitable for general skincare formulations.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources
Keep exploring
From ingredients to everyday care.
Sensitive skin ↗
Start with comfort, product choices and the questions to ask.
Barrier support ↗
Understand moisture, lipids and the limits of ingredient claims.
Ingredient names help you read a label. They do not establish how a finished product will perform. Explore The Garden.