EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673506 Chlorfenvinphos, 100 µg/ml, Ethyl acetate, 5ml Price on request 11171.17-K-ME Dextrorphan tartrate,1000 µg base/mL,MeOH,1mL Price on request 55204 Metals in 25 PSU Price on request