E515 — Potassium Sulfate

E515, known as potassium sulfate, is a food additive primarily used as an acidity regulator and salt substitute. It is synthesized from potassium salts and sulfuric acid and is also found as a natural mineral. 

Danger Level: 0 — Safe

Purpose in Products

Potassium sulfate serves several functions in food products:

  • Acidity Regulator: It helps maintain the desired pH levels in food, contributing to flavor enhancement and preservation. 
  • Salt Substitute: Due to its potassium content, it can be used as a salt replacer in low-sodium products, offering a similar taste profile without the sodium content. 

Health Considerations

Potassium sulfate is considered safe for consumption. The European Food Safety Authority (EFSA) has not established an Acceptable Daily Intake (ADI) for potassium sulfate, indicating no safety concern at the reported uses and use levels. 

Impact on Children

Potassium sulfate is safe for children when consumed in typical dietary amounts.

Impact on Taste

Potassium sulfate is tasteless and odorless, making it an ideal ingredient for various food products without altering their flavor profiles.

Compatibility with Other Additives

Potassium sulfate is compatible with various other food additives, including acidity regulators and salt substitutes. Its water-binding properties make it suitable for use in products requiring moisture retention.

Natural Occurrence

Potassium sulfate is a natural mineral, occurring as the mineral arcanite. 

Alternatives and Substitutes

For those seeking alternatives to potassium sulfate, options include:

  • Potassium chloride (E508): A common salt substitute used to reduce sodium content in food products.
  • Sodium chloride (E500): Common table salt, used for flavoring and preserving food.

Regulation

Potassium sulfate is approved for use as a food additive in many countries, including the European Union, where it is designated as E515. Regulatory bodies such as the European Food Safety Authority (EFSA) have evaluated its safety and concluded that it poses no health concerns when used within established limits.

Conclusion

Potassium sulfate (E515) is a versatile and safe food additive used primarily as an acidity regulator and salt substitute. Its unique properties make it valuable in various food products, enhancing texture and stability. While generally safe, individuals with specific sensitivities should exercise caution.