Originally Posted by
adbuett
The reason certain molecules containing nitrile groups ( CN, cyanide functional group) are poisonous while others aren't is due to the ability for the CN group to break off and interrupt the electron transport chain in the body. If the CN group does not readily break off, the toxicity will be low. Not only do cyanoacrylates not readily give up their CN groups, but upon contact with water the mono-cyanoacrylate polymerizes to give a pretty unreactive molecule. So the second the glue hits your skin it is rendered relatively inert. Don't drink it, but using it on cuts should not affect one adversely. Unless an allergy exists, of course.