4,4'-DDD, 100 µg/ml, Toluene, 5ml

d4 C27 alpha alpha alpha (20R)-Cholestane, 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 205529-74-4

WP & DMRQA Low Level Mercury (Hg)

2,3,4,5-Tetrachlorophenol, 100 µg/ml, Methanol,