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E503Leavening agentLow concern
Ammonium Bicarbonate
In plain words
The short version
'Baker's ammonia' — a leavening agent for thin, crisp baked goods that bakes away leaving no salty residue.
Why it's green
It's widely considered safe at the amounts used in food, so we mark it green. The Safety section below has the details.
Safety profile
No ADI required. It decomposes fully during baking into ammonia, carbon dioxide, and water, leaving nothing behind. The raw powder has a sharp ammonia smell that bakes off.
The detail
Educational information only. Not medical or dietary advice.