Mass-Labelled PCB Solution , 1.2ml x 20ng/ml, nonane Back Catalog number: PCB-SS-A20 Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended M-502-REG-10X-PAK Volatile Mix, 2.0mg/mL in MeOH, 5 x 1ml Price on request 678428 Heptachlor endo-epoxide, 100µg/ml, Acetonitrile, 5ml Price on request 3356.14-100-DC 4,4'-DDD (=TDE), 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 72-54-8 Price on request