Science
Mechanism of Action
While historically utilized to create a continuous film on skin, hair, or nails and impart conditioning benefits, chemically, TMPTA is a highly reactive monomer. It participates in free radical polymerization, functioning primarily as a cross-linking agent and reactive diluent to enhance properties like hardness and chemical resistance in industrial polymer coatings.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Trimethylolpropane Triacrylate is prohibited for use in cosmetics under the EU Cosmetics Regulation. The European Chemicals Agency (ECHA) mandates specific carcinogen labeling for formulations containing more than 0.1% of the substance, highlighting a critical safety threshold for non-cosmetic applications. Its presence at any level in a skincare formulation raises significant safety concerns due to its regulatory status as a carcinogen and irritant.
The Formula
Formulation
Stability
TMPTA is practically stable in water, showing resistance to hydrolysis, and is soluble in various organic solvents. However, it is highly prone to spontaneous polymerization upon exposure to light and strong heat. It is also incompatible with strong oxidizing agents, acids, and bases, necessitating careful handling and storage.
Conflicts
- strong oxidizing agents
- strong acids
- strong bases
- brass
- copper
- steel (all types and surface treatments)
- iron
- iron salts
- light
- heat
Safety
Safety Profile
Trimethylolpropane Triacrylate has been classified as a Group 2B substance (possibly carcinogenic to humans) by the International Agency for Research on Cancer (IARC). California's Proposition 65 lists it as a carcinogen, effective from late 2022. The European Chemicals Agency (ECHA) classified TMPTA as a Class 2 carcinogen from late 2023. It is also documented to cause skin irritation, serious eye irritation, and has the potential to cause an allergic skin reaction. Consequently, the use of Trimethylolpropane Triacrylate in cosmetics is entirely prohibited by the EU Cosmetics Regulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Trimethylolpropane Triacrylate is a probable human carcinogen, a potent irritant, and its application in cosmetic products is explicitly prohibited by EU regulations, rendering it unsuitable for any precision skincare formulation.
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