Synonyms: 1,3,4-Thiadiazole-2-thiol,5-(p-chlorophenyl)-4-phenyl-, meso-ionic deriv. (7CI); 1,3,4-Thiadiazolium,2-(4-chlorophenyl)-4,5-dihydro-3-phenyl-5-thioxo-, inner salt (9CI);1,3,4-Thiadiazolium, 2-(p-chlorophenyl)-5-mercapto-3-phenyl-, hydroxide, innersalt (8CI); NSC 122486; NSC 72390