The point is that nothing is inherently toxic, as there are almost certainly trace amounts of countless different compounds that are "inherently toxic" all around you. Again, it depends on the dose. I don't think there are many, if any, chemicals where a dozen molecules would negatively affect a healthy adult.

I would wager that you inhale more than zero molecules of this "inherently toxic" flame retardant when you breathe. So you are going to stop breathing?