EPA Method 507 Analyte Mix #8 Back Catalog number: 94131 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8839.8-K-IO 2-Isobutylpyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request 70367 3,3’-Dimethylbenzidine Price on request 3380.19-100-AN Diflufenican Price on request