EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79507 Tetrahydrofuran Price on request 2673.7-50-IO Pentabromotoluene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 87-83-2 Price on request 8829.18-K-IO 12-Oxystearic acid, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request