2,2',4,5'-Tetrabromodiphenyl ether, 1.2ml x 50ug/ml, nonane

EPA Method 8310 Surrogates, 50µg/ml in MeChl, 1ml

3-Methoxynaltrexone hydrochloride, neat, Solvent-neat, Unit 20mg, # of units-1, Cas.no. 515836-11-0

Phosphatidylethanol sodium salt,1 millimol free acid (723.5 µg/mL),chloroform,1mL