Both the chlorine atoms in 1,3‐dichloro‐4,6‐dinitrobenzene can be replaced by the glycol residue by interaction with sodium glycolate dissolved in glycol. 4‐6‐Dinitrophenyl‐1,3‐di‐(β‐hydroxyethyl ether), so obtained, gives powerfully explosive nitrate esters when treated with nitric acid; the structure of these esters has been determined by the method described below.