EPA 8240B Calibration Standard Back Catalog number: 98430 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 63174 2,2',3,3',4,5,6'-Heptachlorobiphenyl (174) Price on request 71314 n-Butyl methacrylate Price on request MOPCB-1004S 4-Methoxy-4'-chlorobiphenyl, 100µg/ml in IO, 1ml Price on request