o-Toluidine, 100 µg/ml, Cyclohexane, 1ml

Silver (Ag), 1000µg/ml in 2%-HNO3/Water, 100ml

3,3',5,5'-Tetrabromobiphenyl, 1.2ml x 50ug/ml, nonane

Guanylurea-HCl, 100µg/ml in MeOH, 5ml