17-alpha-Estradiol, certified, 0.1g

4,4'-DDT (ring-13C12), 100ug/ml in n-Nonane, 1,2ml

Prothiophos, 100µg/mL in Acetonitrile, 1ml

n-Alkanes C10-C25, all even and uneven, 16 analytes, 10x1mL