E337 – Potassium Sodium Tartrates
AntioxidantsDescription
Potassium salt of tartaric acid, produced as a byproduct of winemaking; white, crystalline powder
Notes
Potassium sodium tartrate, also known as Rochelle salt, is a crystalline compound that contains both potassium and sodium. It's created as a byproduct during winemaking when tartaric acid (which naturally occurs in grapes) reacts with both sodium and potassium compounds present in the wine-making environment. It can also be produced commercially by combining tartaric acid with both sodium and potassium salts in controlled conditions. This additive serves as an emulsifier, helping to blend ingredients that would normally separate, like oil and water. It helps create smooth, stable textures in processed foods and prevents ingredients from separating over time. You'll find potassium sodium tartrate in some processed cheeses, salad dressings, baked goods, and other products where maintaining a consistent, smooth texture is important. Potassium sodium tartrate is suitable for vegetarian and vegan diets and doesn't present allergen concerns. However, people monitoring their sodium or potassium intake for health reasons should be aware that it contributes both minerals to their diet, though typically in small amounts. Like other tartrate compounds, it's been safely used in food for many years and is approved by food safety authorities globally.