2-Butanol, certified, 5ml

2,3,4,6,7,8-Hexachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

4-Methyl-2-nitrophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 119-33-5

2,3,5,6-Tetrachloroterephthalic acid