I notice that the section on hazards has some references that refer to dibenzofuran itself - making clear that little is known about it except that it is an irritant - whereas others refer to the chlorinated derivatives, which are completely different compounds with different hazards. This is like confusing sodium metal (the element which reacts with water) with sodium in the diet (sodium compounds like salt)! Unfortunately I don't have time to wade through the refs myself right now. Walkerma (talk) 17:06, 9 December 2010 (UTC)Reply