EPA Method 500 Series Internal Std #4

2-Nitroaminoethanol, 1000µg/mL, Solvent-methanol, Unit 1.1mL, # of units-1, Cas.no. 74386-82-6

Imidacloprid urea, 10.0 µg/ml, Acetonitrile, 10m

Polymyxin B sulfate, 100mg