EPA 8041A Internal Standard S-4209-K-5IP 2 Analytes, each 1000µg/mL in isopropanol; unts: 1x1mL, 5x1mL, 1x5mL 2470.6 2,5-Dibromophenol [28165-52-8] 3103.12 2,2’,5,5’-Tetrabromobiphenyl [59080-37-4]