What is E 340?
E 340 is the E number of Potassium phosphates. Potassium salts of phosphoric acid, used as acidity regulators and stabilisers.
What is E 340 used for?
E 340 belongs to the group "Other additives" and is used as acidity regulator, emulsifying salt, stabiliser.
- Acidity regulator: Acidity regulators alter or control the acidity (pH) of a food.
- Emulsifying salt: Emulsifying salts disperse proteins in processed cheese so that fat and other components stay evenly distributed.
- Stabiliser: Stabilisers maintain the physical state of a food, such as an even mixture or colour.
Which foods may contain E 340?
According to the European Commission's database, E 340 may be used in 63 food categories and subcategories, each only in specific products and usually with maximum levels. The categories come from these areas:
- Dairy products and analogues
- Fats and oils and fat and oil emulsions
- Edible ices
- Fruit and vegetables
- Confectionery
- Cereals and cereal products
- Bakery wares
- Meat
- Fish and fisheries products
- Eggs and egg products
- Sugars, syrups, honey and table-top sweeteners
- Salts, spices, soups, sauces, salads and protein products
- Foods for specific groups (infants, young children, special medical purposes)
- Beverages
- Ready-to-eat savouries and snacks
- Desserts
- Food supplements
- Processed foods not covered by categories 1 to 17
Is E 340 vegan?
Usually yes: the substance is normally made from plant, mineral or synthetic raw materials or with microorganisms. In individual cases, only the manufacturer or a vegan label can give certainty.
Is E 340 linked to genetic engineering?
No typical link to genetic engineering is known for this substance: it is not usually obtained from plants for which GM varieties exist, nor produced by fermentation.
How does E 340 appear on the label?
In the list of ingredients, the substance appears with its function, followed by the E number or the name, for example "Acidity regulator: E 340" or "Acidity regulator: Potassium phosphates".
Sources
- Regulation (EC) No 1333/2008, consolidated version of 18.08.2026, Annexes I and II, EUR-Lex
- Food Additives Database, European Commission (accessed 19 October 2026)