EPA Method 548 Analyte Back Catalog number: 30047 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9839.19-10MG Phenylbutazon, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 50-33-9 Price on request 58127 Cobalt (Co) Price on request 675107 Sodium p-n-tridecylbenzenesulfonate, 100 µg/ml, M Price on request