Endosulfan II

1,2,3,4,5,6,7,8,12,12,13,13-Dodecachloro-1,4,4a,5,8,8a,9,9a,10,10a-decahydro-1,2,4:5,8:9,10-trimethanoanthracene,50 µg/mL,toluene,1mL,

1,4-Dichlorobenzene-d4

3,3',5,5'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL,