It should be noted that this book, although it contains some materials from a previously published work, it is by no means the same. Each chemical agent listing has been expanded to include significant additional information. In particular, the listings now include sections containing Informational, Physical and Chemical Properties, Reactivity, Toxicity, Safety, and Military Significant Information. Although listed as Military Significant Information, this section can be used by any first responder, or any person in the field. It is not strictly for military use.