Final report of the cosmetic ingredient review expert panel on the safety assessment of Polyisobutene and Hydrogenated Polyisobutene as used in cosmetics.

What was studied

Evidence synthesis of toxicology, irritation and sensitization data for cosmetic use. Single participant total, duration and funding not established.

Checked against the published assessment on Oct 1, 2026. Source 1 ↗Source 2 ↗