Just because something doesn't kill you right away doesn't mean it hasn't a long-term effect or a chronic effect on you or on the environment. I think if you think of toxic that way, defined as impacting the environment, impacting human health, or impacting the environment as relied on by human health, it's.... Take things like PBDEs. If I sit on my couch, it won't kill me right away, but the flame retardant is building up in my body. If it affects my children's IQ, that's a toxic effect.
On March 10th, 2016. See this statement in context.