EPA 1620 Standard 3

2-(4-[Methylsulfonyl]phenyl)-1H-benzimidazole, neat, Solvent-neat, Unit 10MG, # of units-22, Cas.no. 143426-39-5

4-Methyloctane, 1000µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 2216-34-4

13C6-2,4-D, 100µg/ml in Acetonitrile, 1ml