EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72415 4-Phenyl-1-cyclohexene Price on request 2141.6-1ML tert-Butyl ethyl ether, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 637-92-3 Price on request N-13153-50MG Pyridalyl, 50mg Price on request