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E336

Potassium tartrates

No known risk

Cream of tartar.

Vegan
Yes
Vegetarian
Yes

What it is

A salt of tartaric acid used to add a sharp, sour taste or act as a raising agent in baking.

How it is used in food

Provides a unique, sharp fruit tartness and stabilizes the vibrant colors of fruits and juices.

Commonly found in
  • Baking powder
  • Wine
  • Fruit juices
  • Sweets

Health and safety

Safe. Absorbed poorly by the intestines and largely excreted in urine.

Evaluated by EFSA and confirmed safe for use in food at authorized levels.

Regulatory status

RegionStatusNotes
Australia & New Zealand
FSANZ		 Permitted Permitted under the FSANZ Food Standards Code.
European Union
EFSA / European Commission		 Permitted Authorised for food use under EU regulations (Annex II).
United States
FDA (Food and Drug Administration)		 Permitted Authorised for food use by the FDA (often GRAS for standard additives).

Identification on labels

E-number
E336

Also printed asCream of tartar

Worth knowing

Potassium bitartrate (E336) is commonly sold in grocery stores as "Cream of Tartar" and is essential for stabilizing whipped egg whites for meringues.

Conclusion

You have no reason to avoid potassium tartrates, commonly known as cream of tartar. Sourced naturally from wine vats, it is absorbed poorly by your intestines and easily excreted in urine. EFSA confirms it is safe to consume in baking powder, fruit juices, and sweets.

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Entry last reviewed 2026-07-28.

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