This dataset contains reduced data from small angle neutron and small angle X-ray scattering experiments, and wide angle scattering S(Q) data as described in the manuscript. These data can be used to model and determine the nanostructure of choline chloride:urea deep eutectic solvents containing iron species, followed during reaction with time as they react and convert into iron oxide nanoparticles. Data are presented as .csv files, and the file names are indexed to samples in the initial file (also .csv) in each folder.