EPA 604 Calibration Mixture 11 Analytes, each 500µg/mL in methanol; unit: 1x1mL (2,4-Dinitrophenol and 4,6-dinitrocresol at concentration 1000µg/mL) 2071.7 4-Chloro-3-methylphenol [59-50-7] 2062.6 2-Chlorophenol [95-57-8] 2064.6 2,4-Dichlorophenol [