Science
Mechanism of Action
This ingredient, a trifunctional acrylate ester monomer, acts as a highly reactive cross-linking agent and reactive diluent. In industrial contexts, it rapidly cures under UV or electron beam irradiation to form robust, durable networks, imparting properties like hardness and chemical resistance. When applied to skin, its reactive nature contributes to irritation and sensitization rather than providing any cosmetic advantages.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Human patch tests demonstrated positive vesicular skin reactions indicative of allergic contact dermatitis at concentrations as low as 0.1%. Due to its potent sensitizing and irritating properties, along with the classification of chemically similar compounds as suspected carcinogens at 1% or higher, any intentional inclusion for direct skin contact is a significant red flag.
The Formula
Formulation
Stability
This chemical is hygroscopic and sensitive to light. It is prone to spontaneous polymerization when exposed to direct sunlight and heat, though it can be stabilized with the monomethyl ester of hydroquinone. It should not be combined with strong oxidizing agents, acids, or bases.
Conflicts
- strong oxidizing agents
- acids
- bases
- direct sunlight
- heat
Safety
Safety Profile
PPG-3 Trimethylolpropane Triacrylate is chemically similar to Trimethylolpropane Triacrylate (TMPTA), which is classified by the European Chemicals Agency (ECHA) as a Category 2 carcinogen (suspected of causing cancer, H351) for concentrations of 1% or more, effective December 1, 2023. TMPTA is also identified as a Group 2B carcinogen by IARC and listed under California's Proposition 65. Clinical studies reveal human patch test results with positive vesicular skin reactions indicating allergic contact dermatitis at 0.1% or 0.5% concentrations. Animal studies showed irritation in BALB/c mice at >0.25% and mild to moderate skin reactions in guinea pigs at 0.25% or 0.5%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to its documented high irritancy and sensitization potential at low concentrations, coupled with its chemical similarity to compounds classified as suspected carcinogens, this ingredient offers no benefits for skin and presents significant safety risks, therefore it must be avoided in skincare formulations.
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References
Sources