To what extent is it true to say that some organic compounds, such as E120, E124, E160, E236, E335, E471, and E472, are forbidden if they are included in food?

If one is certain or it is highly probable that forbidden substances are present in the composition of any food or drink, then it becomes forbidden. However, if such a strong probability is not present, there is no objection to consuming it, because the default ruling for things is permissibility.