title: Detection of azobenzene by thin-layer chromatography in pharmaceutical preparations containing phenylbutazone.
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D002855:Chromatography, Thin Layer; D004340:Drug Contamination; D010653:Phenylbutazone / Q000032:analysis*
chemical_list: D001391:Azo Compounds; C009850:azobenzene; D010653:Phenylbutazone