Custom Standard Back Catalog number: 50407 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2003.12-100-IO 2,2',3,4,4',5'-Hexachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 35065-28-2 Price on request 79674 Dibenzothiophene Price on request 9001.21-100-ME Progesterone, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 57-83-0 Price on request