INS 529
salts and related compoundsCalcium Oxide
Halal
Is INS 529 (Calcium Oxide) 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.
Where is INS 529 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 529 on packaging from:
In the EU and UK, the same additive appears as E529. The ingredient, halal status, and sourcing considerations are identical — only the labelling system differs.
EU / UK equivalent: E529
INS 529 and E529 refer to the same food additive — Calcium Oxide. If you are checking a product purchased in the UK or Europe, look for E529 on the label instead.
See full E529 halal guide →About INS 529
Miscellaneous - alkalis
Sources / Derived From
- mineral (burnt limestone)
Foods that commonly contain INS 529
Frequently Asked Questions
Is INS 529 (Calcium Oxide) halal?
INS 529 (Calcium Oxide) is classified as Halal. Generally accepted as halal. Typically derived from plant or synthetic sources with no prohibited ingredients.
What is INS 529 used for?
INS 529 is used as a acidity regulator in food products.
What is the difference between INS 529 and E529?
INS 529 and E529 are the same additive — Calcium Oxide. INS numbers are used on food labels in Australia, New Zealand, Malaysia, Singapore, Indonesia, India, and GCC countries. The E-number system (E529) is used in EU and UK markets. The halal status is identical regardless of which label system is used.
What foods contain INS 529?
INS 529 (Calcium Oxide) is commonly found in: used in sugar and starch processing.
What is INS 529 made from?
INS 529 can be derived from: mineral (burnt limestone).
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