13 components: 100ug/ml each of Sulfamethoxazole [CAS:723-46-6] ; Sulfamethazine [CAS:57-68-1] ; Sulfamethizole [CAS:144-82-1] ; Sulfaquinoxaline [CAS:59-40-5] ; Sulfachloropyridazine [CAS:80-32-0] ; Sulfadiazine [CAS:68-35-9] ; Sulfadimethoxine [CAS:122-11-2] ; Sulfadoxin [CAS:2447-57-6] ; Sulfamerazine [CAS:127-79-7] ; Sulfamonomethoxine [CAS:1220-83-3] ; Sulfapyridine [CAS:144-83-2] ; Sulfathiazole [CAS:72-14-0] ; Sulfisoxazole [CAS:127-69-5] in Methanol