Metribuzin, 1000µg/mL in MeOH, 1ml

Hexanoic acid (Caproic), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 142-62-1

Tetrachloroethylene, in Certan bottle, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 127-18-4

EPA Method 552 Internal Standard