What it is
The isopropyl ester of para-hydroxybenzoic acid, another branched paraben related structurally to propylparaben.
What it does
Preservative for cosmetic formulations, now rarely used due to regulatory action.
Why it’s a concern
Banned in all EU cosmetic products in 2014 alongside isobutyl-, phenyl-, pentyl-, and benzylparaben because safety margins could not be established. Animal studies suggest effects on androgen signalling similar to those seen with longer-chain parabens. Exposure in older US formulations remains possible.
Also known as
isopropyl parabenisopropyl 4-hydroxybenzoate
CAS numbers
4191-73-5
Commonly found in
lotionmakeup
Safer alternatives
- phenoxyethanol
- sodium benzoate
- leucidal liquid
Related chemical families
Sources
- EU Regulation 358/2014