Discontinued ... Back Catalog number: 51123 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 96645 Fermentation Standard Price on request M4H187 2,2',3,4',5,5',6-Heptachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene Price on request 68157 2,3,3',4,4',5'-Hexachlorobiphenyl (157) Price on request