Not likely. I would remove it ASAP.Hmm that's a worry - It's been sat in the box for a while now, is there a risk I've spoiled it?
If it is proper aquarium wood it should be dead dry and other than dusty, OK. The only risk, and there is no way to know in advance, is if there is a toxic substance within the wood. I had this once, back in the 1990's; I had the chunks of wood for over a year, and suddenly the fish slowly became more and more lethargic. With the help of a professional biologist, the problem came down to the wood; it was slowly leeching toxin, assumed to be from the wood species.
Nah, it's fine....Hmm that's a worry - It's been sat in the box for a while now, is there a risk I've spoiled it?