That is one thing I like about TFA and now most flavoring companies I use list that stuff. Almost all your mint flavorings have Triacetin, some fruits do as well. I have less problems with Triacetin than I do oils. FXRich is correct though it does not mix well with VG. I can mix it with high PG juice and not have an issue. As soon as you add VG it will cloud. I don't know what additive it is/was, but some flavorings, when you add VG, turn to jell. Haven't had that issue in a very long time though.