INS 521
salts and related compoundsAlimunium Sodium Sulphate
Halal
Is INS 521 (Alimunium Sodium Sulphate) 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 521 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 521 on packaging from:
In the EU and UK, the same additive appears as E521. The ingredient, halal status, and sourcing considerations are identical — only the labelling system differs.
EU / UK equivalent: E521
INS 521 and E521 refer to the same food additive — Alimunium Sodium Sulphate. If you are checking a product purchased in the UK or Europe, look for E521 on the label instead.
See full E521 halal guide →About INS 521
Chemical
Sources / Derived From
- mineral
Foods that commonly contain INS 521
Frequently Asked Questions
Is INS 521 (Alimunium Sodium Sulphate) halal?
INS 521 (Alimunium Sodium Sulphate) is classified as Halal. Generally accepted as halal. Typically derived from plant or synthetic sources with no prohibited ingredients.
What is INS 521 used for?
INS 521 is used as a raising agent in baking powder in food products.
What is the difference between INS 521 and E521?
INS 521 and E521 are the same additive — Alimunium Sodium Sulphate. INS numbers are used on food labels in Australia, New Zealand, Malaysia, Singapore, Indonesia, India, and GCC countries. The E-number system (E521) is used in EU and UK markets. The halal status is identical regardless of which label system is used.
What foods contain INS 521?
INS 521 (Alimunium Sodium Sulphate) is commonly found in: baking powder, some baked goods.
What is INS 521 made from?
INS 521 can be derived from: mineral.
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