appeared homogenous and transparent up to 4 g/L CUR feed. In contrast, a minor precipitate was observed at 6 g/L CUR feed, but the supernatant was still transparent. Interestingly, when the CUR feed increased to 8 g/L and 10 g/L, the formulation separated to three layers: a small amount of precipitate at the bottom of the tube, an opaque layer in middle making up the majority of the sample and a thin transparent layer on top (Fig. ). Also extended centrifugation for 5 min (rcf= 7788 g) did not sediment the opaque layer. This seems different from a gel-like agglomerate or coacervate which was reported in the formulation of A-poly(2-(3-ethylheptyl)-2-oxazoline)-A (A-pEtHepOx-A) and CUR. This behaviour would be interesting to understand in more detail but this is outside the scope of the present contribution.