PCB No. 31, certified, 25mg Back Catalog number: C20003100 Availability: In the manufacturer's stock Price on request - + Recommended 15900-1585-100AN5 1-(3,4-Dichlorophenyl)urea, 100µg/ml in AL, 5ml Price on request 681349 1-Naphthyl acetic acid-ethyl ester, 250mg Price on request 3415.6-100-DC beta-HCH (BHC), 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 319-85-7 Price on request