On July 17, 2020, South Korea's National Institute of Environmental Research (NIER) officially listed 31 toxic chemical substances (Given No. 2020-1-970~2020-1-1000) into the Toxic Chemical Substances List (TCSL). They were registered and found toxic after the hazard evaluation under K-REACH. In addition, the concentration limits of 7 toxic chemical substances that were previously desiganted (Given No. 97-1-12, 2006-1-556, 2006-1-557, 2006-1-558, 2014-1-694, 2019-1-930 and 2019-1-951) were updated. The updates came into effective immediately.