What is E351?
E351 is Potassium malate, a food additive used as an acidity regulator. No animal source.
Also written as: INS 351, E-351, E 351. INS is the international numbering system used outside Europe, including on labels in Asia, Australia and the Middle East.
What to do
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Is E351 vegetarian or vegan?
Yes. E351 (Potassium malate) is normally made from plant, mineral, microbial or synthetic sources, so it is suitable for vegetarians and vegans.
Why we classify it this way
Halal No animal source.
Basis: No concern found. Made from plants, minerals, fermentation or synthesis, or from a permitted animal product. Nothing in normal production raises a pork, alcohol, insect or slaughter question.
No external reference is listed for this record yet.
Classification audited 3 November 2026. It has not been reviewed by a scholar. How classifications work · Suggest a correction
Frequently asked questions
Is E351 halal?
E351 (Potassium malate) is halal. No animal source.
What is E351 made from?
Malic acid (synthetic or fruit).
What is E351 used for?
E351 is used as an acidity regulator, typically in soft drinks, sweets, jams, sauces and processed foods.
What should I do if a product contains E351?
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Is E351 vegetarian or vegan?
Yes. E351 (Potassium malate) is normally made from plant, mineral, microbial or synthetic sources, so it is suitable for vegetarians and vegans.