EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676877 Thiosultap disodium, 100mg Price on request 2534.12-100-ME (2RS)-2-(4-n-Propylphenyl)propanoic acid, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 3585-47-5 Price on request 1945.19-10MG 4-Fluoro-1-methoxychrysene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. Price on request