What is E405?
E405 is Propylene glycol alginate, a thickener. No animal source.
Also written as: INS 405, E-405, E 405. 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.
Frequently asked questions
Is E405 halal?
E405 (Propylene glycol alginate) is halal. No animal source.
What is E405 made from?
Seaweed and propylene glycol.
What is E405 used for?
E405 is used as a thickener, typically in desserts, sauces, dairy products, ice cream and soups.
What should I do if a product contains E405?
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Related E-numbers
Last reviewed 2026-10-06. How we decide · Suggest a correction