EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C17595000 p-Toluidine, certified, 250mg Price on request 0222.22-K-T Benzo[ghi]perylene, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 191-24-2 Price on request 96610 GHB-D6 Price on request