E332 · Monopotassium citrate, tripotassium citrate
- WHO
- Safe
- FDA
- Safe
- EFSA
- Safe
- FSANZ
- Safe
- Japan
- Safe
- UK FSA
- Safe
- Health Canada
- Safe
What is E332?
Monopotassium citrate and tripotassium citrate are potassium salts of citric acid used as acidity regulators and preservatives in foods and beverages, including sports drinks and electrolyte products. In clinical settings, potassium citrate is used to help manage urinary pH and reduce the risk of certain kidney stones. As food additives they are considered safe for the general population at typical intake levels.
Also appears on labels as: Monopotassium citrate, Tripotassium citrate, Potassium citrate, Potassium salts of citric acid, Citric acid, monopotassium salt, Citric acid, tripotassium salt, KH2C6H5O7, K3C6H5O7, E332, E 332, E-332, E332(i).
What the evidence says
- Generally recognized as safe at typical food-additive levels.
- Contributes dietary potassium; people with impaired kidney function or on potassium-restricted diets should monitor intake.
Research behind the verdict
- GreenScreen Assessment of Potassium Citrate Safety Profile — ToxServices LLC, GreenScreen Chemical Assessment (2024). A detailed chemical safety assessment of potassium citrate (E332) completed in March 2024 using the GreenScreen methodology. The study evaluated environmental and human health impacts, concluding that potassium citrate demonstrates a favorable safety profile. As a potassium salt of citric acid, it serves effectively as a sequestrant and stabilizer in food products. The assessment found no significant toxicological concerns and noted its natural occurrence in various plant sources. The compound is readily biodegradable and poses minimal environmental risk.[safe]
Frequently asked questions
Is E332 safe?
Our overall verdict for E332 (Monopotassium citrate, tripotassium citrate) is “Safe”, based on the most cautious of the major regulators’ positions — FDA: safe; WHO: safe; EFSA: safe; FSANZ: safe; Japan: safe; UK FSA: safe; Health Canada: safe.
Is E332 vegan, halal or gluten-free?
According to our ingredient data for Monopotassium citrate, tripotassium citrate — vegan: yes, vegetarian: yes, halal: yes, kosher: yes, gluten-free: yes, dairy-free: yes. Manufacturing sources can vary between products; check the label if it matters to you.
What is E332 and why is it used?
Monopotassium citrate and tripotassium citrate are potassium salts of citric acid used as acidity regulators and preservatives in foods and beverages, including sports drinks and electrolyte products. In clinical settings, potassium citrate is used to help manage urinary pH and reduce the risk of certain kidney stones. As food additives they are considered safe for the general population at typical intake levels.
Does E332 contain allergens?
No known allergens are recorded for Monopotassium citrate, tripotassium citrate.
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This page summarises publicly available regulatory assessments and research. It is general information, not medical advice. Sources: EFSA, FDA, WHO and the studies linked above.