EPA Method 507 Surrogate Standard Back Catalog number: 19049 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2134.21-K-IO Tri-m-tolylphosphate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 563-04-2 Price on request 677091 Ketotriclabendazole, 10mg Price on request 10738.12.100-IO 2,2',3,3',4,5,6'-Heptachlorobiphenyl Price on request