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South Korea Revises its Designated Toxic Substances

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On October 4, 2023, the National Institute of Environmental Research (NIER) in South Korea published Notice No. 2023-459 on the revision of the Designated Toxic Substances, to strengthen the administration of toxic substances.

Main revisions

1. Updates the name of the substance with the unique number “2017-1-758”; and

2017-1-758: [Triphenylsulfonium salt with 2,3-bis(2,2,2-trifluoroethyl)5-sulfobicyclo [2.2.1] heptane-2,3-dicarboxylate (1:1);2064323-02-8]or mixture containing 25% and above.

2. Adding unique numbers "2023-1-1119" to "2023-1-1122";

  • 2023-1-1119: [Methacrylic acid; 79-41-4] or mixture containing 5% and above;
  • 2023-1-1120: [1, 3 –Bis (isocyanatomethyl)benzene; 3634-83-1]or mixture containing 1% and above;
  • 2023-1-1121: [Dioctyltin dichloride; 3542-36-7] or mixture containing 1% and above; and
  • 2023-1-1122: [Beryllium; 7440-41-7] or mixture containing 1% and above.

Please refer to the annex for specific revisions:


This notice will come into effect three months after its publication.

For individuals, institutions, or groups who have comments on this notice, please submit your comments to the NIER (Tel: 032-560-8494, Fax: 032-568-2038) by October 23, 2023.

The revisions aim to regulate toxic substances more effectively to ensure the safety of the public and the environment. The NIER encourages the public to actively provide valuable comments and suggestions to promote healthier and more sustainable environmental development.

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