Iohexol, 100µg/ml in MeOH, 1ml

Dichloroacetic acid, certified, 1g

1,2-Dibromo-4-(1,2-dibromoethyl)cyclohexane, 100µg/ml in Toluene, 1ml

4,4'-Dichlorobenzophenone, 100 µg/ml, Acetonitril