Ethylene thiourea D4, analytical standard

Paraquat monopyridone iodide, analytical standard

5-Nonadecyl-resorcin, analytical standard

Norgestimate, analytical standard

Trifluralin D14 (di-n-propyl D14), analytical standard

1-Chloro-2-fluorobenzene 2000 µg/mL in Methanol, analytical standard (Supelco)

3-Acetylpyridine, analytical standard, for GC

L-Cystine hydrochloride 10 mM amino acid in 0.1 M HCl, analytical standard

Paraquat dichloride-(rings-d8) hydrate, analytical standard

Malathion D10 (diethyl D10), analytical standard