2,3,3',4,4',5'-Hexachlorobiphenyl (157) Back Catalog number: 68157 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended CA17924300 DL-alpha-Tocopherol (Vitamin E), 500mg Price on request 71493 Quinoxaline-2-carboxylic acid Price on request 51089 MA - EPH Fractionation Surrogate Spike Rev 1.0/1.1 Price on request