E535 โ€“ Sodium Ferrocyanide

Danger Level: 1 (Generally Safe with Minimal Risk)

Sodium ferrocyanide, designated as E535, is an anti-caking agent commonly added to table salt to prevent clumping and ensure free-flowing properties. Despite containing the term «cyanide,» it is considered safe for consumption within regulated limits.

Purpose in Products

E535 is primarily used in:

  • Table Salt: Prevents clumping by absorbing moisture, ensuring the salt remains free-flowing.
  • Salt Substitutes: Maintains consistency in products designed to replace traditional salt.

Its inclusion enhances product quality by preventing moisture-induced clumping.

Health Considerations

Sodium ferrocyanide is generally recognized as safe when used appropriately:

  • Low Toxicity: The compound is stable and does not readily release free cyanide ions under normal conditions.
  • Regulatory Evaluations: The European Food Safety Authority (EFSA) has assessed ferrocyanides, including E535, and established an acceptable daily intake (ADI) of 0.03 mg/kg body weight per day, expressed as ferrocyanide ion.

At the levels typically used in food products, sodium ferrocyanide does not pose a health risk to consumers.

Impact on Children

There are no specific health concerns associated with E535 for children when consumed within the established ADI.

Impact on Taste

Sodium ferrocyanide is used in minimal quantities and does not affect the taste or appearance of food products.

Compatibility with Other Additives

E535 is compatible with other food additives and does not interact adversely with common ingredients.

Natural Occurrence

Sodium ferrocyanide does not occur naturally and is synthetically produced for industrial and food applications.

Alternatives and Substitutes

Alternative anti-caking agents include:

  • Calcium Silicate (E552): Prevents clumping in powdered products.
  • Magnesium Carbonate (E504): Used in salt and other powdered substances to maintain free-flowing properties.

The choice of anti-caking agent depends on the specific requirements of the food product.

Regulation

Sodium ferrocyanide is approved for use as a food additive in many countries, including those in the European Union, where it is permitted in salt and salt substitutes at levels up to 20 mg/kg.ย 

Conclusion

E535 (Sodium Ferrocyanide) is an effective anti-caking agent used primarily in table salt to prevent clumping. When used within regulated limits, it is considered safe for consumption, posing minimal risk to human health.