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From July 1, 2026, newly prepared MSDS or changes to existing MSDS must use the revised format.

On March 27, 2026, South Korea's National Institute of Chemical Safety (NICS) issued Notice No. 2026-5, revising the Designation of Acute Human Hazardous Substances, Chronic Human Hazardous Substances, and Ecological Hazardous Substances under the Act on Registration and Evaluation of Chemicals (K-REACH) and its Enforcement Decree. The previous revision was completed on 7 August 2025.

Korea National Institute of Chemical Safety (NICS) issued Announcement No. 2026-1, officially amending the Chemical Hazard Assessment Results.

Pursuant to partial revisions of the Enforcement Rule of the Act on Registration and Evaluation of Chemicals (K-REACH) announced on October 15, 2025, the National Institute of Chemical Safety (NICS) released a notice on December 17 regarding the procedure for changing the registration entity, specifically the OR change process, within its system.

South Korea issued the Designation Notice of Human, etc. Hazardous Substances.

On December 2, 2025, the National Institute of Chemical Safety (NICS) of South Korea issued Announcement No. 128 of 2025. In accordance with the Act on Registration and Evaluation of Chemicals (K-REACH), NICS released a draft revision of the Regulations on Classification and Labeling of Chemical Substances, etc. and is seeking public comments.

According to industry sources in South Korea, KECO will comprehensively strengthen supervision in the fourth quarter of 2025.

On February 27, 2025, South Korea’s Ministry of Environment (MoE) and Ministry of Justice (MoJ) jointly announced the launch of a K-REACH Compliance Grace Period from February 28 to October 27, 2025, during which non-compliant companies may voluntarily declare past violations. Enterprises that proactively admit failures to register, amend registrations, or submit pre-registrations before February 27, 2025, and rectify these gaps, will be exempt from criminal penalties (imprisonment of up to 5 years), fines (up to KRW 100 million), and additional penalties (5% of annual turnover).

On May 26, 2025, the National Institute of Chemical Safety (NICS) of South Korea issued Notice No. 2025-8, amending the Hazard Assessment Results of Chemical Substances (originally announced as Notice No. 2025-5 on February 18, 2025) under the Chemical Substances Registration and Evaluation Act (K-REACH) and its enforcement rules. The amendments take effect immediately upon publication.

Under K-REACH, polymers meeting PLC criteria may qualify for registration exemptions by submitting GPC reports.