Polyurethane-35
Use With Caution
Synthetic Polymer
Also Known As
PU-35; Polyurethane 35
CAS Number
Not Available
What It Does
Film Former; Binder; Hair Fixative
Why Oh Daisey Rates It This Way
Polyurethane-35 is a synthetic polymer used to improve film formation, adhesion, and long wear in cosmetic formulations. While considered safe for topical use, it is a persistent synthetic polymer with limited biodegradability and potential environmental persistence.
Evidence Level
Strong
Sources
- https://www.cir-safety.org/; https://cosmetics.ec.europa.eu/cosing/