Food additive reference
Acidity regulators (E-numbers)
Acidity regulators control and stabilise the pH of a food. Citric acid (E330), phosphates and carbonates are widely used for this purpose.
22 additives in this class, grouped by regulatory level. Informational only — not medical or dietary advice; see the methodology.
- E170ICalcium carbonateNo regulatory flags
- E332Potassium citratesNo regulatory flags
- E332IMonopotassium citrateNo regulatory flags
- E332IITripotassium citrateNo regulatory flags
- E333Calcium citratesNo regulatory flags
- E333IMonocalcium citrateNo regulatory flags
- E333IIITricalcium citrateNo regulatory flags
- E339Sodium phosphatesRestricted use
- E341Calcium phosphatesRestricted use
- E341IIITricalcium phosphateUnder monitoring
- E500Sodium CarbonatesUnder monitoring
- E501Potassium carbonatesUnder monitoring
- E504IMagnesium carbonateNo regulatory flags
- E511Magnesium chlorideRegulatory attention
- E516Calcium sulphateNo regulatory flags
- E525Potassium hydroxideNo regulatory flags
- E526Calcium hydroxideNo regulatory flags
- E527Ammonium hydroxideNo regulatory flags
- E528Magnesium hydroxideNo regulatory flags
- E530Magnesium oxideNo regulatory flags
- E574Gluconic acidNo regulatory flags
- E578calcium gluconateNo regulatory flags
Questions about acidity regulators
- What are acidity regulators?
- Acidity regulators are food additives that act as acidity regulator — used to control and stabilise the pH of a food. In the EU they are identified by E-numbers and approved under Regulation (EC) No 1333/2008.
- Which E-numbers are acidity regulators?
- Forkin tracks 22 acidity regulators — for example Calcium carbonate (E170I), Potassium citrates (E332), Monopotassium citrate (E332I), Tripotassium citrate (E332II). The full list with each one's regulatory level is on this page.
- Are acidity regulators vegan?
- It depends on the individual additive and its source — many can be produced from plant, mineral or animal-derived raw materials, and the label rarely says which. The Forkin app shows verified vegan and vegetarian status per product.
Check what's in your food with Forkin
Scan any barcode and Forkin flags the acidity regulators and other additives a product contains, with each one's regulatory level. See how Forkin compares to other scanners or view pricing.