alpha-Endosulfan, 100 µg/ml, Methanol, 1ml

x of 4-Nonyl- and 4-t-Octylphenols ethoxylates, 20/4µg/ml in Acetone, 1ml

Terbufos-sulfoxide, 100 µg/ml, Toluene, 1ml

Diltiazem-d3 hydrochloride (acetoxy-d3),1000 µg base/mL,acetonitrile,1mL