This data set contains the simulation input files, scripts, and figures data belonging to the publication Alberto Scacchi, Carlo Rigoni, Mikko P. Haataja, Jakko V. I. Timonen, and Maria Sammalkorpi, "A Coarse-grained Model for Aqueous Two-phase Systems: Application to Ferrofluids", Journal of Colloids and Interface Science (2025). https://doi.org/10.1016/j.jcis.2025.01.256. Please cite the above publication when using this data set! This work was supported by the Swiss National Science Foundation under the project no. P500PT\_206916 (A.S.) and the Academy of Finland through its Centres of Excellence Programs (2022-2029, LIBER) under projects no. 346111 and 364205 (M.S.) and 346112 and 364206 (J.T.). MPH was supported by the National Science Foundation through the Princeton University (PCCM) Materials Research Science and Engineering Center DMR-2011750. A.S. warmly thanks Bob Evans for extensive scientific discussions and for his hospitality during the research visit in Bristol. Computational resources by CSC IT Centre for Finland, the Aalto Science-IT project, and RAMI -- RawMatters Finland Infrastructure are also gratefully acknowledged.

2025