E521 — Aluminium Sodium Sulfate

E521, known as aluminium sodium sulfate, is a food additive primarily used as a leavening agent in baking. It is synthesized by combining sodium sulfate with aluminium sulfate. 

Danger Level: 0 — Safe

Purpose in Products

Aluminium sodium sulfate serves several functions in food products:

  • Leavening Agent: It acts as a slow-acting acidulant in baking powders, contributing to the leavening process in baked goods such as cakes, muffins, and biscuits. 
  • Acidity Regulator: It helps maintain the desired pH levels in food, contributing to flavor enhancement and preservation.

Health Considerations

Aluminium sodium sulfate is considered safe for consumption when used within established limits. The European Food Safety Authority (EFSA) has evaluated its safety and concluded that it poses no health concerns at the reported uses and use levels. 

Impact on Children

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

Impact on Taste

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

Compatibility with Other Additives

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

Natural Occurrence

Aluminium sodium sulfate is a synthetic compound and does not occur naturally in food.

Alternatives and Substitutes

For those seeking alternatives to aluminium sodium sulfate, options include:

  • Monocalcium Phosphate (MCP): A fast-acting leavening acid commonly used in baking powders.
  • Sodium Bicarbonate (Baking Soda): A widely used leavening agent in various baked goods.

Regulation

Aluminium sodium sulfate is approved for use as a food additive in many countries, including the European Union, where it is designated as E521. 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

Aluminium sodium sulfate (E521) is a versatile and safe food additive used primarily as a leavening agent and acidity regulator. Its unique properties make it valuable in various food products, enhancing texture and stability. While generally safe, individuals with specific sensitivities should exercise caution.