EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2501.13-10-T 1-Methyldibenzothiophene, 10µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 31317-07-4 Price on request 66034 2’,3,5-Trichlorobiphenyl Price on request 50586 pH 2.0 Standard @ 25°C Price on request