Just to add a little more detail According to the Energentic Materials Research and Testing Center (EMRTC) in the courseware for Incident Response to Terrorist Bombing "An IEDs has four basic...
TNT is an explosive compound, and can be a component of an I.E.D., but is not one in and of itself, anymore than any other explosive by itself is an I.E.D. The name I.E.D. pretty much defines what it...