Arsenic (As)

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

Carbaryl-d7 (naphthyl-d7), 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 362049-56-7

EPA Method 525 Internals & Surrogates