On February 13, 2023, the Chinese Ministry of Ecology and Environment (MEE) published a notice to solicit comments on the addition of 4 substances to the Inventory of Existing Chemical Substances in China (IECSC). Comments are welcome before February 24, 2023. Details of these substances can be accessed here, including chemical name (both in Chinese and English), CAS number or Series number, molecular formula, structural formula, etc. These 4 substances were manufactured in or imported into China before October 15, 2003, which fulfilled the supplementation criteria but missed the previous supplementation window. They are expected to be regulated as existing chemical substances in China, and thus free from new chemical registration or notification requirements under the MEE Order No. 12. This is the first batch of existing chemical substances that are going to be added to the IECSC in 2023. The last update to the IECSC was made on December 5 of 2022 ,…