Thickener
BIS-HEMA POLY(1,4-BUTANEDIOL)-22/DMPA/NEOPENTYL GLYCOL/IPDI COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A HEMA-capped polyurethane polymer used in nail and film-forming applications where polymerisation reduces monomer exposure, though residual HEMA remains a sensitisation concern.
Bis-HEMA Poly(1,4-Butanediol)-22/DMPA/Neopentyl Glycol/IPDI Copolymer is a urethane polymer end-capped with HEMA (2-hydroxyethyl methacrylate). While the polymerised form significantly reduces free monomer availability, residual HEMA is a known skin sensitiser regulated under EU REACH and considered by the SCCS in nail product contexts. The polymer itself is inert and not absorbed through skin, but professional use in nail products requires adequate ventilation due to monomer exposure risk during application.
Function
Skin benefits
- Film-forming properties for nail and makeup applications
- Provides long-wear performance in cosmetic formulations
Known concerns
- Residual HEMA monomer is a recognised skin sensitiser
- Professional nail product use carries inhalation and skin exposure risks
- Not recommended for home use without protection
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.