EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended M258762 rac Metanephrine-d3 Hydrochloride Salt, 5mg Price on request N-12827-1G Pentachlorobenzene, 1g Price on request 98496 1,2,3,4-Tetrachlorobenzene Price on request