Back to catalogSafety
E212PreservativeModerate concern
Potassium Benzoate
In plain words
The short version
The potassium salt of benzoic acid — a sodium-free alternative to E211 in acidic foods.
Why we flag it amber
It's permitted and generally considered safe, but there are a few reasons to be mindful — like sensitivities in some people, debated studies, or intake limits. The Safety section below explains the specifics.
Safety profile
ADI of 0–5 mg/kg body weight (as benzoic acid, combined with E210/E211/E213). Same concerns and interactions as sodium benzoate: can form benzene with ascorbic acid (E300) under heat and light, especially with copper or iron catalysts. Linked to behavioral effects in the Southampton trial when combined with synthetic dyes.
The detail
Educational information only. Not medical or dietary advice.