Yes — Halal

INS 524

salts and related compounds

Sodium Hydroxide

Also known as: LyeCaustic SodaSodium Hydroxide E524 (EU/UK)

Status

Halal

Function

Acidity regulator - food processing alkali

Halal

Is INS 524 (Sodium Hydroxide) halal?

Generally accepted as halal. Typically derived from plant or synthetic sources with no prohibited ingredients.

What to do

Safe to buy. This additive is permissible under Islamic dietary law.

See which foods use it →

Where is INS 524 used?

INS (International Numbering System) codes are maintained by the Codex Alimentarius Commission and used on food labels in many countries outside the EU. You will commonly see INS 524 on packaging from:

AustraliaNew ZealandMalaysiaSingaporeIndonesiaIndiaSaudi ArabiaUAEGCC countries

In the EU and UK, the same additive appears as E524. The ingredient, halal status, and sourcing considerations are identical — only the labelling system differs.

EU / UK equivalent: E524

INS 524 and E524 refer to the same food additive — Sodium Hydroxide. If you are checking a product purchased in the UK or Europe, look for E524 on the label instead.

See full E524 halal guide →

About INS 524

Miscellaneous - alkalis

Sources / Derived From

synthetic (chlor-alkali process)

Foods that commonly contain INS 524

pretzel processing (gives shiny crust)olive curingpH adjustment in processed foods

Frequently Asked Questions

Is INS 524 (Sodium Hydroxide) halal?

INS 524 (Sodium Hydroxide) is classified as Halal. Generally accepted as halal. Typically derived from plant or synthetic sources with no prohibited ingredients.

What is INS 524 used for?

INS 524 is used as a acidity regulator - food processing alkali in food products.

What is the difference between INS 524 and E524?

INS 524 and E524 are the same additive — Sodium Hydroxide. INS numbers are used on food labels in Australia, New Zealand, Malaysia, Singapore, Indonesia, India, and GCC countries. The E-number system (E524) is used in EU and UK markets. The halal status is identical regardless of which label system is used.

What foods contain INS 524?

INS 524 (Sodium Hydroxide) is commonly found in: pretzel processing (gives shiny crust), olive curing, pH adjustment in processed foods.

What is INS 524 made from?

INS 524 can be derived from: synthetic (chlor-alkali process).

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