Quote Originally Posted by TsPoet View Post
How 'bout going with a PhD in Toxicology?
It's an urban legend. One of many (like Bisphenol A, fluoride...)
I could ramble on forever. But, basically it comes down to the quote by Paracelsus, the Godfather of Toxicology - to paraphrase "The dose makes the poison". The Chemist friend is correct, but almost everything is poisonous, at the right dose. There are even stories of water being poisonous to individuals who drink to much of it.
The dose isn't left on the floor. I wouldn't let my dogs eat the cloths, though.
I've seen an MSDS for coffee

and one that wasn't a joke.... an MSDS for Prismacolor markers.... it listed amount you would have to ingest to get sick... If you could sit down and eat 100 magic markers hats off to you...

One thing I have heard, I'm not sure if this is true either though- if you have sanded something to varnish it do not use a swiffer cloth to clean up the dust before sanding. The varnish won't stick and you'll have to do the sanding all over again.