This publication presents the data and findings of the risk assessment on N-(1‑phenethylpiperidin-4-yl)-N-phenylacrylamide (acryloylfentanyl), carried out by the extended Scientific Committee of the EMCDDA on 22 February 2017. On the basis of the Risk Assessment Report — and on the initiative of the European Commission — on 25 September 2017, the Council decided that acryloylfentanyl should be subject to control measures across the Member States.