2-Hydrazono-4,6-dinitrobenzthiazolones of the formula ##STR1## in which X.sub.1 represents hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -hydroxyalkyl, C.sub.1 -C.sub.4 -sulphoalkyl or C.sub.1 -C.sub.4 -sulphatoalkyl, and X.sub.2 represents hydrogen or --SO.sub.2 X.sub.3, where X.sub.3 may represent hydrogen, C.sub.1 -C.sub.8 -alkyl or optionally substituted aryl and X.sub.1 also represents a double bond between the cyclic nitrogen atom and the carbon atom 2 according to the formula II below: ##STR2## where X.sub.2 has the meaning specified under the above formula. These hydrazones may be employed in the preparation of azo dyestuffs and as color formers for detecting of biological substances, and in the determination of H.sub.2 O.sub.2.
以下式子的2-
肼酮-4,6-二硝基
苯并噻唑酮:##STR1## 其中X.sub.1代表氢,C.sub.1-C.sub.4-烷基,C.sub.1-C.sub.
4-羟基烷基,C.sub.1-C.sub.4-磺基烷基或C.sub.1-C.sub.4-
磺酸酯基,X.sub.2代表氢或--SO.sub.2X.sub.3,其中X.sub.3可以代表氢,C.sub.1-C.sub.8-烷基或可选的取代芳基,X.sub.1还表示循环氮原子和碳原子2之间的双键,如下式II:##STR2## 其中X.sub.2具有上述式子中指定的含义。这些
肼酮可以用于制备偶氮
染料和作为检测
生物物质的颜色形成剂,并用于测定H.sub.2O.sub.2。