What is E943b?
E943b is Isobutane, a food additive used as a packaging gas. Propellant gas.
Also written as: INS 943b, E-943b, E 943b. 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 E943b vegetarian or vegan?
Yes. E943b (Isobutane) 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 Propellant gas.
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 E943b halal?
E943b (Isobutane) is halal. Propellant gas.
What is E943b made from?
Natural gas.
What is E943b used for?
E943b is used as a packaging gas.
What should I do if a product contains E943b?
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Is E943b vegetarian or vegan?
Yes. E943b (Isobutane) is normally made from plant, mineral, microbial or synthetic sources, so it is suitable for vegetarians and vegans.