EPA Method 531.1 - Analytes Back Catalog number: 30042R Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70914 Hydroquinone Price on request 94733 2,4-Diaminoanisole Price on request 673973 4-Nitrophenol, 10.0 µg/ml, Acetonitrile, 10ml Price on request