2',3,4,4',5-Pentachlorobiphenyl (123) Back Catalog number: 66123 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73685 4-Hydroxy-2-butanone Price on request HPCB-3004N 4-Hydroxy-2,2',5'-trichlorobiphenyl, 5mg Price on request 57077 Iridium (Ir) Price on request