What is E946?

Octafluorocyclobutane, or perfluorocyclobutane, C4F8, is an organofluorine compound which enjoys several niche applications. Octafluorocyclobutane is a colourless gas and shipped as a liquefied gas. E946 sits in the E900–E999 series, which in the EU classification mainly covers glazing agents, gases and sweeteners.

What is E946 used for?

E946 belongs to the packaging gases group. Packaging gases are used in packaging to extend shelf life, like nitrogen and CO2.

Is E946 safe?

E946 is considered safe at the levels used in food and is approved for use in the EU. “Safe” means it is approved in the EU and regarded as safe at the levels used in food.

How E946 appears on labels

On food packaging you'll find E946 either as the number “E946” or by the name “Octafluorocyclobutane” in the ingredient list, often after its function. Ingredients are listed in descending order by weight, so an additive near the end is present only in small amounts.

Is E946 vegan?

Yes, E946 is suitable for vegans.