1664 Oil & Grease Calibration Level #4

3,3’-Dimethylbenzidine

1,2,3,7,8-Pentachlorodibenzo-p-dioxin,50 µg/mL,n-nonane,1mL,

4-Hydroxy-11H-indolo[2,3-f]naphthalene, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 23682-01-1