EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10403.2-50MG O,O-Dimethylhydrogenphosphate Price on request 1350.1-1ML Chloroform, in Certan bottle, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 67-66-3 Price on request 70254 Prometryne, 1000µg/ml in MeOH, 1ml Price on request