13C3-Caffeine, 100 µg/ml, Methanol, 1ml

Formothion, 10.0 µg/ml, Cyclohexane, 10ml

1,2-Dimethyl-3-ethylbenzene, 1000µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 933-98-2

Caffeine, 250mg