EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678453 Pentachlorobenzene, 100 µg/ml, Acetonitrile, 1ml Price on request 97389 Radiello Mix #1 Price on request 3503.8-100 2,4,5-T, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 93-76-5 Price on request