CodeE401 · INS 401
TypeThickener
Made fromBrown seaweed.
Found indesserts, sauces, dairy products, ice cream and soups
What is E401?
E401 is Sodium alginate, a thickener. Plant (algae).
Also written as: INS 401, E-401, E 401. 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 E401 halal?
E401 (Sodium alginate) is halal. Plant (algae).
What is E401 made from?
Brown seaweed.
What is E401 used for?
E401 is used as a thickener, typically in desserts, sauces, dairy products, ice cream and soups.
What should I do if a product contains E401?
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
E400Alginic acidE402Potassium alginateE404Calcium alginateE405Propylene glycol alginateE407CarrageenanE407aProcessed eucheuma seaweed
Last reviewed 2026-10-06. How we decide · Suggest a correction