Baratol was an explosive made of a mixture of TNT and Barium nitrate, with a small quantity (about 1%) of wax used as a binder. TNT typically makes up 25-33% of the mixture. Because of the high density of barium nitrate, Baratol was a density charge.
Baratol was used as the "slow" compound in the explosive lenses of early atomic bombs with Composition B often used as the "fast" explosive component. Atomic bombs like those detonated in 1945 at Trinity, the Soviet Joe 1 in 1949, and in India in 1972, used Baratol and Composition B.
Our German Baratol blocks are INERT training aids, or for reenactor use. Also a nice Pioneer display item.