Pentaerythritol tetranitrate
Pentaerythritol tetranitrate (PETN) is a nitrate ester used as a powerful high explosive and as a vasodilator to treat angina.
Nitrate ester: An organic compound in which a carbon-bound oxygen links a carbon group to a nitrate group. PETN’s four nitrate ester groups account for its explosive chemistry and its role as a nitric oxide donor.
Angina pectoris: Chest discomfort caused when the heart muscle receives insufficient oxygen-rich blood. PETN is used to relieve angina by reducing the heart’s workload and improving blood flow.
Pentaerythritol: A four-carbon polyol with four hydroxymethyl groups, used as a chemical building block. PETN is made by converting all four of this molecule’s hydroxyl groups into nitrate ester groups.
Explosive safety: Practices and controls that reduce the risk of accidental initiation, exposure, or injury from explosives. PETN’s high sensitivity to initiation makes storage, handling, and transport controls consequential.
Nitric oxide: A short-lived signaling molecule that relaxes vascular smooth muscle and regulates blood flow. In the body, PETN promotes nitric oxide signaling, widening blood vessels.
Organic nitrates: A group of nitrate ester medicines that promote vascular relaxation through nitric oxide signaling. PETN belongs to this drug group, alongside better-known antianginal nitrates.
Nitrate group: The nitrogen-and-oxygen functional group derived from nitric acid, with formula NO₃. Four nitrate groups are attached through oxygen atoms in PETN’s molecular structure.
Explosive weapon: A weapon that causes damage through the rapid release of energy from an explosive material. PETN’s detonation properties make it relevant to the design and effects of explosive devices.
Vasodilation: The widening of blood vessels through relaxation of vascular smooth muscle. This is the immediate vascular effect behind PETN’s use against angina.
Nitroglycerin: A nitrate ester used as an explosive and as a rapidly acting medicine for angina. Like PETN, it has both explosive and cardiovascular uses, but differs in handling and clinical use.