After disengagement of gas has ceased, water is added to the residue, which forms a precipitate – the chrysammic acid. The mother liquid contains oxalic and chrysolipic acids, which latter appears to be picric." Schunck analysed samples of chrysammic acid, now known to be 1,8–dihydroxy–2,4,5,7–tetranitroanthraquinone, and several of its metal salts, concluding that the formula of the acid was C15H3N4O12.
After gas disengagement, water is added to the residue, which forms a precipitate – chrysammic acid. The mother liquid contains oxalic and chrysolipic acids, which latter appears to be picric. Schunck analyzed samples of chrysammic acid, now known to be 1,8–dihydroxy–2,4,5,7–tetranitroanthraquinone, and several of its metal salts, concluding that the formula of the acid was C15H3N4O12.