*Warning for cancer causing chemicals* is not advertised. In the details section of this listing there are no warnings and when I asked wayfair aboit this I was told that all of the parts had been tested and were chemical free but as I was putting the bookcase together there was a warning label on the wood. So if you are sensitive to chemicals (especially formaldehyde) or are trying to keep your home as chemical free as possible, this is not for you. It definitely smells bad for a while- gave me a headache.