2,3,3',4,4',5,5'-Heptachlorobiphenyl (189) Back Catalog number: 66189 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677939 Chlorpyrifos-methyl, 250mg Price on request ALR-176N Monoisobutyl phthalate, 100mg Price on request PL6827-1001 LodeStars High Bind Streptavidin 1ml Price on request