On September 13, 2021, 23 toxic chemical substances (Given No. 2021-1-1057~2021-1-1079) were officially listed into the Toxic Chemical Substances List (TCSL) by NIER Announcement No.2021-62[1], with corresponding classification information, pictograms, signal words, hazard statements, M factors and UN No. They were registered and found toxic after the hazard evaluation under K-REACH.