2-Isopropylthioxantone, certified, 0.1g

(±)-Bisoprolol-d7 Hemifumarate (iso-propyl-d7)

Chlorotoluron, 100 µg/ml, Acetonitrile, 5ml

2,4'-DDT-13C12,100 µg/mL,n-nonane,1mL,