What is E542?
E542 is Bone phosphate, an anti-caking agent. Made from bones. Only halal if the bones come from a halal-slaughtered animal; the source is rarely stated.
Also written as: INS 542, E-542, E 542. INS is the international numbering system used outside Europe, including on labels in Asia, Australia and the Middle East.
What to do
Look for a halal logo, a "vegan" label, or a stated plant source on the pack. If none of these are present, you can contact the manufacturer and ask for the source.
Frequently asked questions
Is E542 halal?
E542 (Bone phosphate) is doubtful (mushbooh). Made from bones. Only halal if the bones come from a halal-slaughtered animal; the source is rarely stated.
What is E542 made from?
Animal bones.
What is E542 used for?
E542 is used as an anti-caking agent, typically in salt, powdered drinks, spices, supplements and tablets.
What should I do if a product contains E542?
Look for a halal logo, a "vegan" label, or a stated plant source on the pack. If none of these are present, you can contact the manufacturer and ask for the source.
Related E-numbers
Last reviewed 2026-10-06. How we decide · Suggest a correction