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Thailand Imposes Destruction Order on PFOA and Its Related Substances

Related enterprises shall submit the proof of destruction to Thailand’s DIW in the form required before June 19, 2023.

By Notification of MOI B.E. 2565 issued in December 2022, Thailand’s Department of Industrial Works (DIW) updated the List of Hazardous Substances (hereinafter referred to as the List) was updated to add 8 perfluorooctanoic acid (PFOA), its salts and PFOA-related compounds as hazardous substances. They are classified as Type 3 or Type 4 hazardous substances as per specific conditions (Read more). On February 28, 2023, the DIW issued an order in the Royal Gazette regarding the management of these newly added hazardous substances (when they are classified as Type 4).

The target hazardous substances are in Annex 5.1 of the List, including:

1) No. 534: Perfluorooctanoic acid (CAS No. 335-67-1)

2) No. 535: Ammonium perfluorooctanoate (CAS No. 3825-26-1)

3) No. 536: Sodium perfluorooctanoate (CAS No. 335-95-5)

4) No. 537: Potassium perfluorooctanoate (CAS No. 2395-00-8)

5) No. 538: Silver perfluorooctanoate (CAS No. 335-93-3)

6) No. 539: Perfluorooctanoyl fluoride (CAS No. 335-66-0)

7) No. 540: Methyl perfluorooctanoate (CAS No. 376-27-2)

8) No. 541: Ethyl perfluorooctanoate (CAS No. 3108-24-5)


  1. Stakeholders (manufacturers, importers, etc.) of the target hazardous substances shall report the remaining volume of them and the corresponding destruction plan in the form of ‘WoAo./AoKo. 33 (วอ./อก. ๓๓)’ before April 18, 2023.

  2. After fulfilling the abovementioned reporting requirements, stakeholders shall carry out the destruction of the remaining PFOA and its related substances by incineration and submit the proof of destruction in the form of ‘WoAo./AoKo. 34 (วอ./อก. ๓๔)’ before June 19, 2023.

The abovementioned two forms are attached to the DIW Order. Violators shall be punished with imprisonment not exceeding 6 months or/and a fine not exceeding 50,000 baht. If related enterprises disagree with the order to proceed the foregoing requirements, they can appeal in writing to the DIW before March 30, 2023.

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