EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1356.6-100-DC Hexachlorobenzene, 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 118-74-1 Price on request CLM-3375-1.2 Ethynylestradiol (20,21-13C2,99%) 100 µg/mL in Acetonitrile, 1,2ml Price on request 10288.14-200-T 1,8-Dimethylcarbazole Price on request