0 1-Chlorobenzotriazole CAS 21050-95-3 In APIs, Pharmaceutical Chemicals, Products 21050-95-3,1-Chlorobenzotriazole,1H-Benzotriazole, 1-Chloro- (8Ci)(9Ci); 1-Chloro-1H-Benzotriazole; 1H-Benzotriazole, 1-Chloro-