On February 28, 2023, the Department of Industrial Works (DIW) in Thailand published the regulation on the "Management of Hazardous Substances relating to Perfluorooctanoic Acid (PFOA) and Its Salts, and Related Compounds" in the Royal Gazette which requires business operators should notify DIW of the inventory and progress of these substances.
To achieve this goal, the Thailand government has released a list of hazardous substances that includes eight PFAS related compounds. In accordance with the Hazardous Substances Act, any production, import, or possession of these substances is prohibited. The regulation will take effect 15 days after the publication in the Royal Gazette. The regulation shall enter into force 15 days from the date of publication in the Royal Gazette.
The following 8 substances in the list are classified into 4 types of hazardous substances:
| Serial No. | Name of substances | CAS Number |
| 1 | perfluorooctanoic acid | 335-67-1 |
| 2 | ammonium perfluorooctanoate | 3825-26-1 |
| 3 | sodium perfluorooctanoate | 335-95-5 |
| 4 | potassium perfluorooctanoate | 2395-00-8 |
| 5 | silver perfluorooctanoate | 335-93-3 |
| 6 | perfluorooctanoyl fluoride | 335-66-0 |
| 7 | methyl perfluorooctanoate | 376-27-2 |
| 8 | ethyl perfluorooctanoate | 3108-24-5 |
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Manufacturers, importers or possessors of any hazardous substances above should submit the "Report on the remaining amount and processing plan of hazardous substances" (in Vor Or./OrKor. 33 format) to DIW before April 18, 2023.
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Manufacturers, importers or possessors of any hazardous substances above shall submit the amount of the remaining hazardous substances and destroy these substances in special incinerators by June 19, 2023 with a certificate of destruction to DIW ( in Vor Or./Or Kor. 34 format).
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Manufacturers, importers or possessors who have objections to the above provisions may submit an appeal letter to DIW within 15 days. Any acts in violation of these stipulations shall be sentenced to a maximum of 6 month's imprisonment or be fined up to 50,000 Thai baht, or both.
