EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676804 Chlorothalonil-4-hydroxy, 10.0 µg/ml, Acetonitril Price on request 94996A Fluorobenzene Price on request 675781 Resmethrin, 100 µg/ml, Ethyl acetate, 5ml Price on request