EPA Method 531.1 - Analytes Back Catalog number: 30042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2039.12-50-NN Octachlorodibenzofuran,50 µg/mL,n-nonane,1mL, Price on request X9086 3,3’-Dimethylbenzidine Price on request 79217 1,1-Dichloropropanone-2 Price on request