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.
Because mercury toxicity is a common claim of anti-vaxxers and because you implied the alleged source of the mercury which caused your CFS is something that upsets most people. Doesn't seem like that much of a stretch to think that you're referring to vaccines.
If you were less weirdly cryptic about it, we could just have a normal exchange and perhaps I'd learn something new. Perhaps you instead believe it's from seafood and people don't like hearing that they shouldn't be eating fish, IDK.
What exactly is the source of the mercury that you're referring to? You accuse others of not being able to have rational/intelligent conversation in this thread, yet you haven't even stated your basic premise, just trolled and then acted like a victim when people got annoyed with your coyness.