Measurement of astaxanthin and squalene diffusivities in compressed liquid ethyl acetate by Taylor-Aris dispersion method

•Diffusivities of bioactive compounds for application in simulation & process design.•D12 of astaxanthin & squalene in ethyl acetate obtained by chromatographic technique.•Exp. conditions with interest for SLE, LLE and SFE (303.15–333.15 K; 1–150 bar)•Analysis of D12 dependency on P, T, solvent viscosity, and molecular size & weight.•Eleven models tested with deviations between 0.50 and 53.56 %.