2,2',3,4,4',5,5'-Heptabromobiphenyl

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

Stavudine, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 3056-17-5

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)