4,4'-Diaminodiphenylmethane, >98%, 25g

2,4-Dibromodiphenyl ether, 1.2ml x 50ug/ml, nonane

COD Calibration Standard

3,4,5-Trichlorocatechol , 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 56961-20-7