2,2',3,4,4',5-Hexachlorobiphenyl (137) Back Catalog number: 66137 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681370 Trigonelline HCl, 100mg Price on request 51144 WA EPH Fractionation Check Standard Price on request 78005 Dalapon Price on request