EPA Method 531.1 Individual Analytes Back Catalog number: 31241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675254 1,3,5-Trinitrobenzene, 100 µg/ml, Acetonitrile, Price on request 71249 Fenamiphos sulfone Price on request 71860 Mesityl oxide Price on request