Recently, the Thai Ministry of Industry released the "List of Hazardous Substances (8th Edition) B.E. 2568 (2025)", and the new regulations were announced through the government gazette (ราชกิจจานเบกษา). The following is a summary of the core content:
Key amendments
1. Deletion of two substances
- List 1.2, item 8: Extracts from plants such as neem, galangal, citronella, etc. used for preventing and destroying insects and pests
- List 4.1, item 99: Citronella oil [CAS: 8000-29-1]
2. Addition of two substances
List 1.1 (Department of Agriculture):
| No. | Substance name | CAS number | Type of hazardous substance | Exemption condition |
| 687 | pentachlorobenzene | 608-93-5 | 4 | - |
| 688 | hexachlorobutadiene | 87-68-3 | 4 | - |
3. Revision of information for 17 substances
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List 1.1, item 194: Dicofol [CAS: 115-32-2]
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List 1.2:
– Item 9: Active ingredients, microorganisms, plant extracts, or products manufactured to control plant growth (e.g., flowering stimulation, inhibition, or retardation, fruit setting, color change, root formation).
– Item 10: Active ingredients, microorganisms, plant extracts, or products manufactured to prevent, eliminate, destroy, attract/lure, or control insects or animal pests.
– Item 11: Active ingredients, microorganisms, plant extracts, or products manufactured to prevent, eliminate, destroy, or control plant diseases.
– Item 12: Active ingredients, microorganisms, plant extracts, or products manufactured to prevent, eliminate, destroy, or control weeds or undesirable plants. -
List 4.1, item 223: Hydrogen Peroxide [CAS: 7722-84-1]
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List 4.2, item 22: Chlorine and Chlorine-Releasing Substances
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List 5.1, items 71–73, 85, 88, 95, 122, 147, 283, 289:
– Gold(I) cyanide [CAS: 506-65-0]
– Gold sodium cyanide [CAS: 15280-09-8]
– Gold potassium cyanide [CAS: 13967-50-5]
– Copper(I) cyanide [CAS: 544-92-3]
– Copper(II) cyanide [CAS: 14763-77-0]
– Cadmium cyanide [CAS: 542-83-6]
– Zinc cyanide [CAS: 557-21-1]
– Sodium cyanide [CAS: 143-33-9]
– Potassium cyanide [CAS: 151-50-8]
– Propionitrile (ethyl cyanide) [CAS: 107-12-0]
