EPA Method 548.1 Analyte Back Catalog number: 30177 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3754.20-K-IO 4-tert-Octylphenol 3EO, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2315-62-0 Price on request 50738 Nitrite as NO2- Price on request 679075 Methoprene, 10 µg/ml, Acetonitrile, 10ml Price on request