Not even just a "form". Thimerisol is a compound. I like to compare it to saying we shouldn't eat table salt because it contains chlorine. Now, as to the safet

Not even just a "form". Thimerisol is a compound. I like to compare it to saying we shouldn't eat table salt because it contains chlorine. Now, as to the safety of Thimerisol, obviously that has to be judged on its own merits, but just because a compound "contains" a certain kind of atom, by itself means nothing.