Each kit contains 20 mg each of nineteen compounds.2-Chlorophenol 2,3,5-Trichlorophenol3-Chlorophenol 2,3,6-Trichlorophenol4-Chlorophenol 2,4,5-Trichlorophenol2,3-Dichlorophenol 2,4,6-Trichlorophenol2,4-Dichlorophenol 3,4,5-Trichlorophenol2,5-Dichlorophen