EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71838 2,2’-Dinitrobiphenyl Price on request 3399.9-K-ME Fenoprop,1000 µg/mL,MeOH,1mL, Price on request XA15960000CY Pentachlorobenzene, 100µg/ml in CY, 1ml Price on request