EPA Method 505/507 - Pesticide Standard Back Catalog number: 91936 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72125 Cephalexin Price on request 71977 1,2-Benzodiphenylene sulfide Price on request 11789.12-50-NN 2,4,8-Trichlorodibenzofuran,50 µg/mL,n-nonane,1mL, Price on request