PCB No. 18, certified, 25mg

Thiophene/2-Methylthiophene (2:1) in isooctane/Toluene(3:1); Units: 5x1mL ampoules, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4056-0 Blank 0 S-4056-5 5

Heptachlor-exo-epoxide, 100 µg/ml, Acetonitrile,

2,4,5-Trichlorophenol