EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682216 Metribuzin-desamino-diketo, 100 μg/ml, Acetonitrile, 1ml Price on request 91870 Aroclor 1254 Price on request 10170.24-K-IO 4-tert-Octylphenol 5EO, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request