EPA Method 552.2 - Surrogate Standard Back Catalog number: 30109 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677965 Quinalphos, 100 µg/ml, Toluene, 1ml Price on request DF-1234678-S 1,2,3,4,6,7,8-Heptachlorodibenzofuran , 1.2ml x 50ug/ml, nonane Price on request 678054 Flufenacet ESA sodium salt, 100 µg/ml, Acetonitri Price on request