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Hexanitrohexaazaisowurtzitane (HNIW / CL-20)

Hexanitrohexaazaisowurtzitane, commonly known as HNIW or CL-20, is a high-performance polycyclic cage nitramine explosive. It is noted for its superior energy density compared to HMX and RDX, making it ideal for advanced military propellants and high-energy munitions.

Key Details:

Chemical Formula: C6H6N12O12

Alternative Names: HNIW, CL-20, 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane

Description: A white, cage-structured, crystalline polycyclic nitroamine. High-density and high-energy material with a high oxygen-to-fuel ratio, providing roughly 20% more energy than HMX-based explosives.

Primary Uses:

  • Military & Propellants: Used as an energetic filler in rocket motors, advanced munitions, and insensitive explosive formulations.
  • High-Energy Applications: Serves as a replacement for HMX and RDX in applications requiring higher velocity and energy density.

Background: Developed by the U.S. Naval Air Warfare Center, China Lake. It represents a next-generation high-energy material in modern propellant research.

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