On Oct 15th, 2019, South Korea's National Institute of Environmental Research (NIER) officially listed 18 toxic chemical substances (Given No. 2019-1-931 ~ 2019-1-948) into the Toxic Chemical Substances List (TCSL). They were registered and found toxic after the hazard evaluation under K-REACH. In addition, the chemical names of three toxic chemical substances (Given No. 97-1-130, 2014-1-695, 2017-1-789) were updated. The updates came into effective immediately.