WHO PCB Extraction Standard, 100pg/µl in nonane, 1,2ml

2,3,3',4',6-Pentachlorobiphenyl, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 38380-03-9

2-Hydroxy-3-methylbutyric acid

2-Hydroxydibenzofuran, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 86-77-1