What is E511?
E511 is Magnesium chloride, a food additive used as a firming agent. Mineral. Used to set tofu (nigari).
Also written as: INS 511, E-511, E 511. 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.
Is E511 vegetarian or vegan?
Yes. E511 (Magnesium chloride) is normally made from plant, mineral, microbial or synthetic sources, so it is suitable for vegetarians and vegans.
Why we classify it this way
Halal Mineral. Used to set tofu (nigari).
Basis: No concern found. Made from plants, minerals, fermentation or synthesis, or from a permitted animal product. Nothing in normal production raises a pork, alcohol, insect or slaughter question.
No external reference is listed for this record yet.
Classification audited 3 November 2026. It has not been reviewed by a scholar. How classifications work · Suggest a correction
Frequently asked questions
Is E511 halal?
E511 (Magnesium chloride) is halal. Mineral. Used to set tofu (nigari).
What is E511 made from?
Mineral salt.
What is E511 used for?
E511 is used as a firming agent.
What should I do if a product contains E511?
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Is E511 vegetarian or vegan?
Yes. E511 (Magnesium chloride) is normally made from plant, mineral, microbial or synthetic sources, so it is suitable for vegetarians and vegans.