This standard specifies the technical requirements, test methods, inspection rules and markings, packaging, transportation, storage and safety of chlorinated co-generation of nitrososulfuric acid. This standard applies to the tail gas produced during the chlorination (nitro chlorination reaction) production process. The co-produced nitrososulfuric acid obtained after sulfuric acid absorbs nitrogen oxides (NO, NO2) in the tail gas is mainly used for diazotization. Reactive industrial raw materials.