Benzo(a)pyrene, 10 ng/µl, 10ml

Hexavalent Chromium (Cr 6+)

3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium Bromide, >98%, 1g

Theophylline, 100μg/mL in Acetonitrile, 1ml