Mass-Labelled PCB Internal/Recovery Standards, 1.2ml, nonane

Metoprolol Acid, 5mg

2,4-Dinitrophenol, 250mg

2-Phenyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 104353-07-3