Caffeine, 1000µg/ml in MeOH, 1ml

Benzofuran, 1000µg/mL, Solvent-n-hexane, Unit 1mL, # of units-1, Cas.no. 271-89-6

2-Ethyl-1-methylbenzene (2-ethyltoluene, o-ethyltoluene), 1000µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 611-14-3

Hexachloro-1,3-butadiene 13C4, 100µg/mL in Acetone, 1ml