EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2687.18-K-IO Hexaethylbenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 604-88-6 Price on request 9492.6-100-IO Triethylphosphate-d15, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 135942-11-9 Price on request 11616.21-100MG Prednisolone,neat,neat,100mg, Price on request