The Hazardous Substance Act B.E.2535 (1992) classifies hazardous substance into 4 types according to degrees of hazards and risks and the needs for control

Type 1 hazardous substance is the hazardous substance that has less impact on

human health and environment than the other types. Manufacturers and importers are not required to register their products but product information must be notified to the authorities. Furthermore, business operators must comply with the specified criteria and procedures, such as labeling, rules and conditions for manufacturing and storage. The notifying number must be declared on product label.

Examples of the type 1 hazardous substances under the responsibility of Thai Food and Drug Administration (Thai FDA) are as followed:

  • Cleaning products, such as dish washing products, liquid laundry detergents containing anionic or nonionic surfactants as active ingredients. (except nonylphenol ethoxylate)
  • Adhesives containing alkyl cyanoacrylate as active ingredients
  • Swimming pool disinfectants containing calcium hypochlorite, sodium hypochlorite, dichloroisocyauric acid and its salts or trichloroisocyauric acid and its salts as active ingredients

Type 2 hazardous substance is the hazardous substance that has the degrees of

hazards or risks higher than type 1. Manufacturers and importers must obtain product registration certificates. Manufacturers, importers, exporters or professional use possessors of the type 2 hazardous substances must notify the authorities before the operations of type 2 hazardous substances. The hazardous substance registry number must be declared on the product label.

Examples of the type 2 hazardous substances under the responsibility of Thai FDA are as followed:

  • Household and public health pesticides containing insect growth regulators as active ingredients
  • Cleaning products/disinfectants (except any products containing the type 1 or type 3 hazardous substances as active ingredients)

Type 3 hazardous substance is the hazardous substance that has the degrees of

hazards or risks higher than the above mentioned types. Manufacturers and importers must obtain product registration certificates. Manufacturers, importers, exporters or professional use possessors of type 3 hazardous substances must receive the permission from the authorities before the operations of type 3 hazardous substances. The hazardous substance registry number must be declared on the product label.

Examples of the type 3 hazardous substances under the responsibility of Thai FDA are as followed:

  • Household and public health pesticides containing chlorpyrifos or pyrethroids as active ingredients
  • Cleaning products/disinfectants containing acids, alkalines, or aldehydes as active Ingredients

Type 4 hazardous substance is the hazardous substance that has high degrees of hazards or high risks either from its applications or its intrinsic properties, e.g., carcinogens, mutagens, reproductive toxicants or prohibited substances by the related Conventions. Thus, manufacturing, import, export or possession of such substances is prohibited.
Examples of the type 4 hazardous substances under the responsibility of Thai FDA , such as DDT, chlordane or dieldrin.