Aroclor 1254

Dextromethorphan hydrobromide monohydrate,1000 µg base/mL,MeOH,1mL,

(±)-Sotalol-d7 hydrochloride (isopropyl-d7),1000 µg/mL,MeOH,1mL,

2,3,3',4'-Tetrachlorobiphenyl (56)