EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1827.9-1G DL-2-Phenylpropionic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 492-37-5 Price on request 92535 2-Chloronaphthalene Price on request 679424 13C6-Oxyclozanide, 10mg Price on request