2,2',3,3',4,5,6'-Heptachlorobiphenyl (174) Back Catalog number: 66174 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3353.8-K-ME 2,4-D,1000 µg/mL,MeOH,1mL, Price on request 679665 13C6-Mefenamic acid, 10mg Price on request 680174 Phenylparaben, 25mg Price on request