EPA Method 551.1 Internal Standard

2-Cyclopentyl-4-chlorophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 13347-42-7

Perthane, 100 µg/ml, Acetonitrile, 1ml

2,3,5-Trichlorophenol-PFB derivative