CodeE524 · INS 524
TypeAcidity regulator
Made fromSynthetic.
Found insoft drinks, sweets, jams, sauces and processed foods
What is E524?
E524 is Sodium hydroxide, an acidity regulator. Synthetic.
Also written as: INS 524, E-524, E 524. INS is the international numbering system used outside Europe, including on labels in Asia, Australia and the Middle East.
What to do
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Frequently asked questions
Is E524 halal?
E524 (Sodium hydroxide) is halal. Synthetic.
What is E524 made from?
Synthetic.
What is E524 used for?
E524 is used as an acidity regulator, typically in soft drinks, sweets, jams, sauces and processed foods.
What should I do if a product contains E524?
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Related E-numbers
E260Acetic acidE261Potassium acetateE262Sodium acetatesE263Calcium acetateE270Lactic acidE296Malic acidE516Calcium sulphateE542Bone phosphate
Last reviewed 2026-10-06. How we decide · Suggest a correction