Ipronidazole-hydroxy, 100 µg/ml, Methanol, 1ml

2H-Perfluoro-2-octenoic acid (6:2), 1.2ml x 50ug/ml, isopropanol

2,2',3,3',5,5',6,6'-Octachlorobiphenyl (202)

4-tert-Butyltoluene