EPA Method 8240A Internal Standard Back Catalog number: 22003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10592.28-50MG Bis(2-propylhetyl) Phthalate Price on request 70851 Tetradifon Price on request 673511 Chlorpyrifos-methyl, 10.0 µg/ml, Ethyl acetate, Price on request