Thickener
BIS-HEMA POLY(1,4-BUTANEDIOL)-9/SMDI COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A film-forming polymer used to hold the formula together. It has a more noticeable irritation or sensitization profile than basic cosmetic ingredients.
This is a high-molecular-weight polymer or silicone that mostly stays on the surface of skin, hair, or nails to create slip, adhesion, or a uniform film. That keeps it usable in some products, but it is less comfortable than simple moisturizers and should be handled with more caution.
Function
Known concerns
- Possible irritation from residual monomers or impurities
- Acrylate or HEMA-type sensitization
- Possible residual diisocyanate impurities
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related thickeners
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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.