alpha-Endosulfan-d4 (1,1,5,5-d4),100 µg/mL,n-nonane,1mL,

1,2,4,5-Tetrachlorobenzene, 1000µg/mL in Isooctane, 1ml

Acetone-2-13C,2000 µg/mL,MeOH,1mL,

4,4'-Dimethylbibenzyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 538-39-6