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On 5 June 2025,the Ministry of Industry issued the Announcement on Hazardous Substances List (No. 8) B.E. 2568 (2025) under Section 5 and Section 18 of the Hazardous Substances Act B.E. 2535 (1992), with the approval of the Hazardous Substances Committee.

Clause 1 – Revocations

The following items from the Hazardous Substances List B.E. 2556 (2013) (dated 28 August 2013) are revoked:

• List 1.2 (Department of Agriculture) – Sequence No. 5: Plant extracts (e.g., neem, galangal, lemongrass) for preventing/eliminating agricultural pests.
• List 5.1 (Food and Drug Administration) – Sequence No. 13: Citronella oil.

Clause 2 – Revisions

The following items in the 2013 list are revoked and replaced:

2.1 Department of Agriculture

• List 1.1 – Sequence No. 155: Dicofol.
• List 1.2 – Sequence Nos. 5, 10, 11, 12:
• No. 5 – Active ingredients/microorganisms/products for regulating plant growth (stimulating, inhibiting, or retarding), including flowering, fruiting, color change, rooting, etc.
• No. 10 – Active ingredients/microorganisms/products for preventing, eliminating, destroying, or controlling insects or animals that are plant pests.
• No. 11 – Active ingredients/microorganisms/products for preventing, eliminating, destroying, or controlling plant diseases.
• No. 12 – Active ingredients/microorganisms/products for preventing, eliminating, destroying, or controlling weeds or undesirable plants.

List 5.1 – Sequence Nos. 1, 32, 3, 55, 88, 95, 122, 153, 283, 289: 

• Gold (I) cyanide
• Gold sodium cyanide
• Gold potassium cyanide
• Copper (I) cyanide
• Copper (II) cyanide
• Cadmium cyanide
• Zinc cyanide
• Sodium cyanide (except parts under FDA responsibility)
• Potassium cyanide (except parts under FDA responsibility)
• Propionitrile (ethyl cyanide)

Clause 3 – Additions

The following are added to List 1.1 (Department of Agriculture):

• Sequence No. 253: Pentachlorobenzene
• Sequence No. 255: Hexachlorobutadiene

Clause 4 – Transitional Provisions

• Type 3 hazardous substances – Operators in business before the effective date must apply for permission within 30 days. If registration is required, it must be submitted within the same period.

• Type 4 hazardous substances – Operators in business before the effective date must comply with competent official orders within 180 days.

Clause 5 – Effective Date

Effective the day after publication in the Government Gazette.

Announced:  5 June B.E. 2568 (2025)
Signed: Ekanat Prompan, Minister of Industry

List 1.1, Controlled Substances – Department of Agriculture

List 1.2, Controlled Substances – Department of Agriculture

List 5, Controlled Substances – Food and Drug Administration

List 5.1, Controlled Substances – Department of Industrial Works (Type 3)