delta-HCH, 100 µg/ml, Methanol, 5ml

1,2,3,4-Tetrachloro[13C12]dibenzo-p-dioxin , 1.2ml x 50ug/ml, toluene

Methylarsonic acid, 100mg

17 alpha(H),21ß(H)-(22RS)-Bishomohopane, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 54352-50-0