Vegan

E264 is classified as vegan by the local ingredient taxonomy.

Names you may see on a label

Octan amonuАцетат аммонияAmmonium acetateAmmoniumacetat아세트산 암모늄Acetato de amónioAcetato di ammonioAcetato de amonioAmmoniumacetaatOctan amonnýAmmoniumasetaattiAmmoniumasetaattiaAcétate d'ammonium

How to verify it

Check that the name refers to this exact ingredient and not a similar additive with a different source.