Back to catalogSafety
E222PreservativeElevated concern
Sodium Bisulphite
In plain words
The short version
The sodium bisulfite salt — a common solid sulfite source that releases SO2 on contact with acid.
Why we flag it
It's allowed, but comes with clearer cautions — such as reactions in sensitive people, stricter limits, or contested safety. The Safety section below explains why.
Safety profile
ADI of 0.7 mg/kg body weight (combined sulfites, expressed as SO2). Same allergen concerns as all sulfite-class additives — asthma trigger, anaphylaxis risk, thiamine destruction. Mandatory allergen labelling above 10 mg/kg SO2.
The detail
Educational information only. Not medical or dietary advice.