EPA Method 531.1 Individual Analytes Back Catalog number: 30041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93223 4,4’-Butylidenebis(6-tert-butyl-m-cresol) Price on request 71780 N-Phenyl-1,4-phenylenediamine Price on request 681348 Aminopyralid-methyl, 10mg Price on request