Vegan

E233 is classified as vegan by the local ingredient taxonomy.

Names you may see on a label

Tiabendazol4-tiazolilbenzimidazolThiabendazol4-thiazolylThiabendazoleThiabendazolobenzimidazoloThiabendazoolbenzimidazoolTiabendatsoliTiabendatsolia4-tiazolyylibentsimidatsolibenzimidazole

How to verify it

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