PETN generally does not explode when dropped or set on fire. Usually, a strong shock wave from a blasting cap or an exploding wire detonator is needed to set it off. ... PETN is a major ingredient of the plastic explosive Semtex and is used in detonation cables.

How does PETN explode?

It is one of the most powerful explosives made today and is a favourite among terrorists because its colourless crystals are hard to detect in a sealed container. PETN is relatively stable and is detonated either by heat or a shockwave.

How does detonation cord work?

Detonation Cord consists of a high-explosive (either PETN or RDX) core wrapped in a reinforced, waterproof, olive-drab plastic coating that transmits a detonating wave. ... When the explosive core is detonated by a blasting cap, the wave travels along the cord to other blasting caps or explosive charges attached to it.