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

Carvedilol-d4 (ethyl-d4), neat, Solvent-neat, Unit 10mg, # of units-, Cas.no. 1133705-56-2

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol

Dibenzo[b,k]chrysene, 200µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 217-54-9