Parathion-methyl, 10.0 µg/ml, Ethyl acetate, 10m

2,4-Dihydroxybenzophenone, 1000mg

Metoprolol-d7 hydrochloride (isopropyl-d7),1000 µg base/mL,MeOH,1mL

4-Hydroxycarbazole, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 52602-39-8