4-Chloro-2-methylaniline, 100 µg/ml, Acetonitrile

Chlorpyrifos, 1000µg/ml in Hexane 1ml

1H-1,2,4-Triazole-3,5-13C2, 5mg

EPA Method 502/524 Surrogate Standard #3, 2000µg/ml in MeOH, 1ml