rac Metoprolol-d7, 1mg

1,1-Dichloroethene, 1000µg/ml in MeOH, 1ml

1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin ,50 µg/mL,n-nonane,1mL,

2,4-Dichlorophenol, certified, 0.25g