LOL! just like the mustard gas used during WWI (*primarily chlorine based), people would spread the rumour that the Chlorine in Sodium Cloride (NaCl) would kill you also.
Now, what about H2O, you say? Isn't that supposedly explosive as well (just because common water is also known chemically as H2O?)?
@OP: as a plumbing contractor, you have every rights to be concern RE:DHMO. Afterall: aren't you dealing with it on a regular basis, more so than anybody else on this earth?
Yes, I agree that you have all the rights to be of concern. Me? Not so much. Afterall: my critical thinking has been fooling me all along with this said subject.