PETN, or pentaerythritol tetranitrate, is a powerful explosive often used in military and industrial applications. It is known for its high detonation velocity and stability, making it suitable for use in various types of munitions and blasting agents. PETN is typically found in a white crystalline form and can be combined with other materials to enhance its explosive properties. Due to its effectiveness, PETN is sometimes used in detonating cords and as a booster for other explosives. It is classified as a nitro compound and is sensitive to shock and friction, requiring careful handling and storage to prevent accidental detonation.