Supporting Information Title: Cold crystallisation behaviour of water molecules in ionic liquids as a screening method to evaluate biocompatibility of the hydrated ionic liquids Authors: Kyoko Fujita, a,b,c Yohsuke Nikawa, a,b and Hiroyuki Ohno* a,b,c a Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan b Functional Ionic Liquid Laboratories (FILL), Graduate School of Engneering, Tokyo University of Agriculture and Technology. c Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda, Tokyo 102-0076, Japan. *Corresponding author: E-mail: ohnoh@cc.tuat.ac.jp, Tel and Fax: +81-42-388-7024 Electronic Supplementary Material (ESI) for Chemical Communications This journal is © The Royal Society of Chemistry 2013