PCB Congener Internal Standard Mix Back Catalog number: 94569 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3391.9-100 Endosulfan , 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 115-29-7 Price on request 3404.9-100-CY Fenuron Price on request 1755.8-1G Di-n-butyldisulfide, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 629-45-8 Price on request