South Korea’s National Institute of Chemical Safety (NICS) has released updated hazard review results for chemical substances, reflecting ongoing efforts to strengthen chemical safety management under the national regulatory framework.

Recent Update: On 10 March 2026, NICS issued Announcement No. 2026-3, revising previously published hazard review results, with the changes taking immediate effect.

Key Regulatory Developments

The update introduces significant revisions to both new and existing chemical substances, enhancing transparency and regulatory oversight:

Disclosure of previously confidential substances:

  • 67 new chemical substances (with expired data protection periods) are now publicly disclosed with full identifiers and CAS numbers

Addition of newly reviewed substances:

  • 56 existing substances have been added following completion of hazard assessments
  • Each includes classification, labeling, and hazard data

Revision of existing entries:

  • Hazard data for multiple substances has been updated to reflect new scientific findings

    • Publication of complete hazard review list:

    • Consolidated list of reviewed substances with hazard classifications and key properties
    • These updates ensure that regulatory databases remain aligned with latest scientific and risk assessment information.

    Regulatory Framework

    The revisions are issued under South Korea’s K-REACH and its enforcement rules.

    The hazard review system plays a critical role in:

    • Identifying substances hazardous to human health and the environment
    • Defining classification and labeling obligations
    • Supporting regulatory control measures under the Chemical Control Act

    This framework is comparable to the EU REACH system, emphasizing data-driven chemical management.

    Scope & Threshold Insights

    • Applies to both new and existing chemical substances
    • Triggered by hazard assessment outcomes, not tonnage thresholds

    Includes:

    • Substance identity (CAS number, name)
    • Hazard classification (health/environmental)
    • Physicochemical and toxicological data

    This reflects a hazard-based regulatory approach, ensuring that classification drives compliance obligations.

    Key Compliance Implications

    Following the update, companies must:

    • Verify whether their substances are included in the updated lists
    • Update Safety Data Sheets (SDS)
    • Revise labels and hazard communication
    • Ensure compliance with updated classification and regulatory requirements

    Failure to align with revised hazard classifications may result in non-compliance risks and enforcement actions.

    Who is affected?

    • Chemical manufacturers and importers in South Korea
    • Downstream users handling regulated substances
    • Exporters supplying chemicals into the Korean market
    • Compliance and regulatory affairs teams

    Timeline & Implementation

    • 30 January – 19 February 2026: Public consultation period
    • 10 March 2026: Final revision issued by NICS
    • Effective Date: Immediate upon publication

    This rapid implementation highlights the need for real-time regulatory monitoring and quick compliance response.

    The latest update by NICS underscores South Korea’s proactive approach to chemical safety, with continuous revisions to hazard classifications and increased transparency. The immediate applicability of the changes requires companies to act swiftly to update documentation and ensure compliance under K-REACH.

    Source: Korea NICS Hazard Update

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