Potassium sodium tartrate
Function: Acidity regulators
E337 is the European food-additive number for Potassium sodium tartrate, an acidity regulator — used to control and stabilise the pH of a food. Potassium sodium tartrate (E337) is a sequestrant used as a food additive.
What is E337 used for?
Potassium sodium tartrate (E337) is an acidity regulator — used to control and stabilise the pH of a food. It is added during food production for a technological purpose rather than for nutrition. See all Acidity regulators (E-numbers).
Is E337 safe or restricted?
E337 is approved for use in the EU. It sits among the additives EFSA keeps under ongoing review as new evidence is published. Forkin classifies it as “Under monitoring” and does not make health claims. See the methodology for how regulatory levels are assigned, or the guide to how EU additives are approved, re-evaluated and banned.
Is E337 vegan or vegetarian?
Potassium sodium tartrate (E337) is typically produced from plant, mineral, or synthetic sources, so it is generally suitable for vegans and vegetarians.
The production source can vary between manufacturers — the Forkin app shows product-specific vegan and vegetarian signals where available, based on ingredient and label data. Always read the label for allergens.
Which foods contain E337?
E337 appears in 153 of the 4.9 million products in Forkin's catalogue — most often in Candy & Sweets, Gummy Candy, and Chocolate Candy.
- Candy & Sweets16
- Gummy Candy16
- Chocolate Candy10
- Chewing Gum7
- Marshmallow6
- Flavored Yogurt6
- Pastry4
- Cakes4
Often appears alongside
Additives most frequently found in the same ingredient lists as E337 across the catalogue.
Counts reflect Forkin's independently enriched product catalogue and update as new products are added — they are not a market-share statistic.
Frequently asked questions about E337
- What is E337?
- E337 is the E-number for Potassium sodium tartrate, an acidity regulator — used to control and stabilise the pH of a food. Potassium sodium tartrate (E337) is a sequestrant used as a food additive.
- What is E337 used for?
- Potassium sodium tartrate (E337) is an acidity regulator — used to control and stabilise the pH of a food. Manufacturers add it during processing rather than for nutrition. The Forkin app shows which products in your scan history actually contain it.
- Which foods contain E337?
- E337 appears in 153 of the 4.9 million products in Forkin's catalogue — most often in Candy & Sweets, Gummy Candy, and Chocolate Candy. Scan any barcode with the Forkin app to see instantly whether a specific product contains it.
- Is E337 vegan or vegetarian?
- Potassium sodium tartrate (E337) is typically produced from plant, mineral, or synthetic sources, so it is generally suitable for vegans and vegetarians. The Forkin app shows product-specific vegan and vegetarian signals where available, based on ingredient and label data, since the source can vary between manufacturers.
- Is E337 safe, and is it banned anywhere?
- E337 is approved for use in the EU. It sits among the additives EFSA keeps under ongoing review as new evidence is published. Forkin classifies it as ‘Under monitoring’ and does not make health claims — see the methodology page for how regulatory levels are assigned, and the Forkin app for the full profile, including acceptable daily intake (ADI) and restrictions by country.
See the full profile in Forkin
The Forkin app surfaces the full regulatory profile of E337 — acceptable daily intake (ADI), restrictions by country, vegan and vegetarian status, alternative names, and which products in your scan history contain it. See view pricing.