4-Dyestuff Test Solution, hydrophilic, 10 ml4 Dyestuff Test Solution, hydrophilic, Biostep, Density (D) ~1 g cm, UN Nr. 1219 The multicolor test solution is ideal for practical exercises, training sessions, or educational purposes to vividly demonstrate the properties of mobile and stationary phases. Applications: Practical exercises Training sessions Demonstrations of chromatographic principles To optimize conditions for TLC analysis, it can be helpful to add a test mixture separately to each