EPA Method 8260B Surrogate Standard Back Catalog number: 23004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71992 Pyrazoxyfen Price on request 79061 4-Chlorophenol Price on request 8423.10-10MG Pyrazon, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1698-60-8 Price on request