I read it was triacetone triperoxide (TATP) which is quite similar in explosive power to C4 but far far less stable, especially to shock and heat. IMHO anyone walking around with this in his heels is playing poker with less than 52 cards a deck.

Some info regarding some common explosive names is at: http://www.atf.treas.gov/pub/treas_p...os_bib_app.htm

MisterNice