2,2',3,3',4,5,6'-Heptachlorobiphenyl (174) Back Catalog number: 63174 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 20226 CLP Pesticide Mix “A” Price on request 52041A Interference Standard 4 Price on request 675463 Nalidixic acid, 100mg Price on request