Roxithromycin, 100 µg/ml, Methanol, 1ml

(±)-Betaxolol-d7 hydrochloride (N-iso-propyl-d7)

EPA Method 515.1 - Performance Check Solution

3'-Fluoro-2,2',4,5,5'-pentachlorobiphenyl, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.