On March 31, 2022, Thailand’s Department of Industrial Works (DIW) notified WTO of the draft amendments to the List of Hazardous Substances under the Hazardous Substance Act B.E. 2535 (1992) (Notification G/TBT/N/THA/659, hereinafter referred to as Notification) for comments until May 31, 2022. As per the Notification, the DIW drafted some amendments to revise and add certain hazardous substances on the list of hazardous substances. Such amendments are proposed to facilitate the proper control measures for certain concerned substances in line with the Stockholm Convention on Persistent Organic Pollutants. They are summarized as below.