EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79672 Diethyl phthalate Price on request 676173 2-Methyl-5-nitroaniline, 250mg Price on request 690172 m-Phenylenediamine, 100mg Price on request