EPA Method 525.2Mix #1 Back Catalog number: 92207 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1856.21-K-IO n-Pentadecylbenzene-d36, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 352431-31-3 Price on request 92808 Fonofos Price on request M4M172 2,2',3,3',4,5,5'-Heptachloro-4'-methoxy[13C12]biphenyl, 1.2ml x 50ug/ml, toluene Price on request