EPA Method 539Mix #2 Back Catalog number: 96885 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50183 Mix #3 Price on request 0150.16-500-IO 4-n-Butyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 147792-33-4 Price on request 673099 Propyphenazone, 250mg Price on request