Baratol is an explosive made of a mixture of TNT and barium nitrate, with a small quantity (about 1%)[1] of paraffin wax used as a phlegmatizing agent.
TNT typically makes up 25% to 33% of the mixture.
Baratol, which has a detonation velocity of only about 4,900 metres per second,[2] was used as the slow-detonating explosive in the explosive lenses of some early atomic bomb designs, with Composition B often used as the fast-detonating component.
Atomic bombs detonated at Trinity in 1945, the Soviet Joe 1 in 1949, and in India in 1972 all used Baratol and Composition B.
[1] Baratol was also used in the Mills bomb, a British hand grenade.