INS 551
salts and related compoundsSilicon Dioxide/Silica Salt
Halal
Is INS 551 (Silicon Dioxide) 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 551 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 551 on packaging from:
In the EU and UK, the same additive appears as E551. The ingredient, halal status, and sourcing considerations are identical — only the labelling system differs.
EU / UK equivalent: E551
INS 551 and E551 refer to the same food additive — Silicon Dioxide/Silica Salt. If you are checking a product purchased in the UK or Europe, look for E551 on the label instead.
See full E551 halal guide →About INS 551
Miscellaneous - silicon salts
Sources / Derived From
- mineral (quartz sand)
Foods that commonly contain INS 551
Frequently Asked Questions
Is INS 551 (Silicon Dioxide/Silica Salt) halal?
INS 551 (Silicon Dioxide/Silica Salt) is classified as Halal. Generally accepted as halal. Typically derived from plant or synthetic sources with no prohibited ingredients.
What is INS 551 used for?
INS 551 is used as a anti-caking agent - prevents powders from clumping in food products.
What is the difference between INS 551 and E551?
INS 551 and E551 are the same additive — Silicon Dioxide/Silica Salt. INS numbers are used on food labels in Australia, New Zealand, Malaysia, Singapore, Indonesia, India, and GCC countries. The E-number system (E551) is used in EU and UK markets. The halal status is identical regardless of which label system is used.
What foods contain INS 551?
INS 551 (Silicon Dioxide/Silica Salt) is commonly found in: table salt, powdered spices, dried soups, sugar, coffee whiteners, probiotic supplements.
What is INS 551 made from?
INS 551 can be derived from: mineral (quartz sand).
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