2,3,3’,4,4’,5’-Hexachlorobiphenyl (157) Back Catalog number: 66157 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92581 PAH Standard Price on request 95650 8270 Add-On Mix Price on request 91958A EPA Method 1664 - Oil & Grease (Sonicate) Price on request