If it was the case that the chemicals found by the Jordanians was weapons grade material then it would have been breaking news via the Pentagon and especially the ISG. The Jordanians recovered vast quantities of off the shelf chemicals and pesticides, but not weapons grade nerve agents. Jordan would have given the US full access to the chemicals found for testing. Not one Pentagon report has come out that any of those chemicals found was weapons grade chemicals from battle field weapons. If it was the case then President Bush or Rumsfeld would have been broadcasting it to the world.
What you say makes sense except for the fact that I can't name any "off-the-shelf" blistering agents, nerve gas or choking agents. Can you?