Please do your homework, inform yourself.
When you say things like this, you sound like someone telling people that table salt is extremely dangerous, possibly even lethal.
Why? Well, table salt is really sodium chloride. And we all know that chloride is highly dangerous, possibly lethal.
Therefore, according to your current line of reasoning, table salt must be avoided like hell.
If you’d like to have a consistent line of reasoning, you must either accept the lethal danger of table salt, or you must admit that thiomersal is not by definition dangerous just because it contains mercury.