EPA Method 502/524 Surrogate Standard #2 Back Catalog number: 19267 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11432.20-100-IO Di-p-tolylphenyl phosphate,100 µg/mL,isooctane,1mL, Price on request 674960 Profenofos, 10.0 µg/ml, Cyclohexane, 10ml Price on request 1348.20-100-T Benzo[b]fluoranthene-d12, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 93951-98-5 Price on request