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Found on
https://www.crosswordclues.com/clue/tritonal

Tritonal is a mixture of 80% TNT and 20% aluminium powder, used in several types of ordnance such as air-dropped bombs. The aluminium improves the total heat output and hence impulse of the TNT - the length of time during which the blast wave is positive. Tritonal is approximately 18% more powerful than TNT alone. The 87 kg of tritonal in a Mark 8...
Found on
http://en.wikipedia.org/wiki/Tritonal
No exact match found.