||Hexamethylene triperoxide diamine (HMTD) is a high explosive organic compound. The theorized structure served well as an initiating, or primary explosive. While quite sensitive to shock and friction, it is relatively stable compared to other initiating explosives of the time, such as mercury fulminate, and proved to be relatively inexpensive and easy to synthesise. As such, it was quickly taken up as a primary explosive in mining applications. However, it has since been superseded by even more stable compounds such as tetryl.