ednatol is a yellow high explosive, comprising about 58% ethylenedinitramine (aka haleite or explosive h) and 42% tnt. it was developed in the united states circa 1935 and used as a substitute for composition b in large general purpose and fragmentation bombs. it has a detonation velocity of approximately 7,400 metres per second. it is a uniform blend with a melting point of 80°c.