EPA 604 Calibration Mixture as PFB derivatives 11 Analytes, each 200µg/mL in methanol; unit: 1x1mL 2071.7 4-Chloro-3-methylphenol [59-50-7] 2062.6 2-Chlorophenol [95-57-8] 2064.6 2,4-Dichlorophenol [120-83-2] 1406.8 2,4-Dimethylphenol [105-6