Abstract: A process for the production of 2, 2', 4, 4', 6, 6'-hexanitrostilbene, which gives a readily isolable product and in which solvent recovery is relatively straightforward, is described.An alkali or alkaline earth hypochlorite was reacted with 2, 4, 6-trinitrotoluene in an aqueous organic solvent, preferably containing tetrahydrofuran. The reactant mixture was allowed to stand for at least 30 minutes when a solution of a mineral acid, especially sulphuric acid, was added, with stirring, to acidify the mixture to a final pH of less than 5, preferably between 0.5 and 1.0, especially 0.7. This acidification caused agglomeration of the hexanitrostilbene. When complete mixing of the solutions had been obtained, the stirring was stopped and the mixture allowed to settle and separate into two layers. The top layer, which contained little solid product, was run off through a filter and the filtrate was treated separately to recover solvents, especially tetrahydrofuran.