Registers of Specific Exemptions for chemicals listed in Annex B

Article 4 of the Convention provides for the establishment of a Register for the purpose of identifying the Parties that have specific exemptions listed in Annex A or Annex B.

Please click on the chemical names listed below in the table to display respective registers. 

For information on how to register specific exemptions please click here.

List of registers for chemicals listed in Annex B

Specific exemptions
Perfluorooctane sulfonic acid (CAS No: 1763-23-1), its saltsa and perfluorooctane sulfonyl fluoride
(CAS No: 307-35-7)

  a For example:

potassium perfluorooctane sulfonate
(CAS no. 2795-39-3);

lithium perfluorooctane sulfonate
(CAS no. 29457-72-5);

ammonium perfluorooctane sulfonate
(CAS no. 29081-56-9);

diethanolammonium perfluorooctane sulfonate (CAS no. 70225-14-8);

tetraethylammonium perfluorooctane sulfonate (CAS no. 56773-42-3);

didecyldimethylammonium perfluorooctane sulfonate (CAS no. 251099-16-8).


As allowed for Parties listed in the Register



For the following specific uses, or as an intermediate in the production of chemicals with the following specific uses:

  • Photo masks in the semiconductor and liquid crystal display (LCD) industries

  • Metal plating (hard metal plating)

  • Metal plating (decorative plating)

  • Electric and electronic parts for some colour printers and colour copy machines

  • Insecticides for control of red imported fire ants and termites

  • Chemically driven oil production