E 337 Sodium potassium tartrate

What is E 337?

E 337 is the E number of Sodium potassium tartrate. Mixed salt of tartaric acid, used as an acidity regulator.

What is E 337 used for?

E 337 belongs to the group "Other additives" and is used as acidity regulator, sequestrant.

• Acidity regulator: Acidity regulators alter or control the acidity (pH) of a food.
• Sequestrant: Sequestrants bind metal ions and so prevent unwanted reactions.

Which foods may contain E 337?

According to the European Commission's database, E 337 may be used in 1 food categories and subcategories, each only in specific products and usually with maximum levels. The categories come from these areas:

• Fruit and vegetables

Is E 337 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 337 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 337 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 337" or "Acidity regulator: Sodium potassium tartrate".