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E 524Acidity Regulators & Anti-caking Agents

Sodium hydroxide

Characteristics

Additive NameSodium hydroxide
E No.E 524
TypeIndividual Substance
In plain language

A strong alkali used to adjust acidity and pH in processed foods — it makes dough rise, softens olives, and gives pretzels their distinctive chewy crust. Found in jams, spreads, cereal-based baby foods, and caseinates. It is not consumed as-is; it reacts during processing and neutralises, leaving harmless sodium salts. Considered safe at the levels used in food production by EFSA and FDA.

Conditions of Use

This additive is authorised to be used in the following 6 food categories:

4.2.5jam jellies and marmalades and similar products
Quantum satis (no max)
4.2.5.3other similar fruit or vegetable spreads
Quantum satis (no max)
13.1.3Processed cereal-based foods and baby foods as defined by Regulation (EU) No 609/2013
Quantum satis (no max)
only processed cereal based foods and baby foods, only for pH adjustment
Quantum satis (no max)
only for pH adjustment
1.9Edible caseinates
Quantum satis (no max)
1.10Milk-based drinks and similar products intended for young children*
Quantum satis (no max)
only for pH adjustment

Source

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E 524 - Sodium hydroxide | E-Number Information