South Korea Updates Hazard Data for 100+ Chemicals

South Korea has released revised chemical hazard assessment results covering more than 100 substances, strengthening regulatory transparency under its national chemical management framework. The update was issued by the National Institute of Chemical Safety through Announcement No. 2026-1 in accordance with the Act on the Registration and Evaluation of Chemical Substances (K-REACH).

The revision enhances public access to hazard information and updates classification data for both existing and newly assessed substances.

Newly Assessed Substances Added to Official Database

The announcement incorporates 56 newly evaluated substances into the national hazard assessment database. For each substance, authorities have published:

• Registration number
• Chemical name and CAS number
• Hazard classifications
• Physicochemical and toxicological data

This addition expands the publicly available hazard dataset and supports improved chemical risk management across
industries.

Revisions to Existing Hazard Classifications

In addition to new entries, hazard information for five previously listed substances has been revised based on updated scientific evidence. These modifications may affect classification, labelling, and downstream compliance obligations.

Companies handling affected chemicals should verify whether updated hazard categories require revisions to Safety Data Sheets (SDS) or product labels.

Disclosure of Previously Confidential Substances

A significant aspect of the revision involves increased transparency. The authorities disclosed the identities of 67 new chemical substances whose confidentiality protection period expired in 2024. Corrections were also made to duplicated listings to ensure data accuracy.

This disclosure enhances regulatory clarity and allows stakeholders to better assess supply chain exposure.This disclosure enhances regulatory clarity and allows stakeholders to better assess supply chain exposure.

Public Comment Opportunity

Stakeholders were invited to submit written comments on the revised hazard assessment results before the designated deadline in February 2026. Feedback may influence final adjustments to the published classifications.

Compliance Implications for Industry

The updated hazard information may trigger compliance actions under K-REACH, including:

• Updating SDS documentation
• Revising product classification and labeling
• Reassessing workplace safety measures
• Reviewing supply chain communication

Manufacturers, importers, and downstream users operating in South Korea should conduct a prompt compliance review to ensure alignment with the revised hazard assessments.

Strengthening Chemical Risk Transparency

This latest update reflects South Korea’s continued efforts to enhance chemical safety governance, improve transparency, and ensure science-based hazard communication. By expanding disclosure and updating classifications, authorities are reinforcing the foundation for safer chemical management nationwide.

Source: Korea Hazard List Update 2026