4-Dodecylphenol, mixture of isomers, 250mg

Chlorpyrifos, 100µg/mL in MeOH, 1ml

2-n-Octylthiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 880-36-4

EPA Method 552.2 - Surrogate Standard