EPA Method 500 Series Internal Std #4

Bis(2,3-dibromopropyl)phosphate, tech., 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 5412-25-9

3,5-Dichlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 34883-41-5

Acrylonitrile