Piperonyl butoxide Back Catalog number: 96221 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8930.18-100-W Iopromide-d3, 100µg/mL, Solvent-water, Unit 1mL, # of units-1, Cas.no. Price on request 28013 EPA Method 8260B Purgeable Internal Standard Price on request 684563 Chlorpyrifos-methyl-desmethyl TMA salt, 100 µg/ml, Price on request