What is E577?

Potassium gluconate is the potassium salt of the conjugate base of gluconic acid. It is also referred to as 2,3,4,5,6-pentahydroxycaproic acid potassium salt, D-gluconic acid potassium salt, or potassium D-gluconate. E577 sits in the E500–E599 series, which in the EU classification mainly covers acidity regulators and anti-caking agents.

What is E577 used for?

E577 belongs to the stabilisers group. Stabilisers keep mixtures even and stop ingredients separating. Most are safe.

Is E577 safe?

E577 is considered safe at the levels used in food and is approved for use in the EU. “Safe” means it is approved in the EU and regarded as safe at the levels used in food.

How E577 appears on labels

On food packaging you'll find E577 either as the number “E577” or by the name “Potassium gluconate” in the ingredient list, often after its function. Ingredients are listed in descending order by weight, so an additive near the end is present only in small amounts.

Is E577 vegan?

Yes, E577 is suitable for vegans.