2,2’,3,4’,5,5’,6-Heptachlorobiphenyl (187) Back Catalog number: 66187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59144 TOC Calibration Standard (C) Price on request 677840 Nafronyl oxalate salt, 250mg Price on request 61004 Acid Extractables Price on request