N-2,4-Dimethylphenyl-N'-methylformamidine HCl, 10.

EPA Method 502.2 Internal Standard

Nitrofen, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 1836-75-5

Bis(4-tert-butylphenyl) phenyl phosphate, 1.2ml x 50ug/ml, toluene