EPA Method 8240A Calibration Check Compounds

2,3,6-Trichlorophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 933-75-5

4,4'-Diaminobiphenyl-d8 (Rings-d8)

p-Coumaric acid ethyl ester, >98%, 20mg