Singapore Singapore announces public consultation on new regulations for five chemicals

NEA intends to add five substances under review in the Stockholm Convention and the Rotterdam Conventions into the Environmental Protection and Management Act

On August 30, 2021, the National Environment Agency of Singapore (NEA) released a proposal of national legislations for five chemicals that are being reviewed as new controlled substances in the Stockholm Convention and the Rotterdam Conventions (Amitrole, Nonylphenol and Nonylphenol Ethoxylates, Iprodione, Dechlorane Plus, and UV-328). In order to ensure implementation of the international conventions, the NEA proposes to regulate these five substances as “hazardous substances (HS)” under the Environmental Protection Management Act (EPMA) and the Environmental Protection Management (Hazardous Substances) Regulations (EPM (HS) Regulations) tentatively by March 1, 2023.

The call for comments will run until September 24, 2021.

The original announcement by the NEA on this matter can be viewed at the following URL. proposed-control-of-additional-chemicals-as-hazardous-substances-%28hs%29-in-singapore

Five chemical substances under consideration for new inclusion in international conventions and obligations of parties

Rotterdam Convention

(i) Amitrole

(ii) Nonylphenol (NP) and Nonylphenol Ethoxylates (NPE)

(iii) Iprodione

Stockholm Convention

(i) Dechlorane Plus (DP)

(ii) UV-328

If the Conference of the Parties (COPs) in June 2022 decides to add these chemicals to the Annexes, the obligations of the Parties will enter into force within 9 to 12 months of the decision.

Environmental Protection and Management Act of Singapore

This is the basic regulations for the management of hazardous substances in Singapore. It governs the import, sale and supply of hazardous substances, and is administered by the National Environment Agency (NEA), a subordinate body of the Ministry of Sustainability and the Environment. Under this act, any person who imports, owns for sale, or sells hazardous substances is required to obtain a license. The amendments in 2019 newly added 10 substances adopted or considered under the Stockholm Convention, such as Perfluorooctanoic Acid (PFOA) and Perfluorohexane Sulfonic Acid  (PFHxS), and under the Rotterdam Convention, such as Benzidine, Acetochlor, and Amitraz.



Substance Information

The detailed information of the five substances excerpted from NEA’s document is the following:

Name Dechlorane Plus
CAS RN 13560-89-9,

135821-03-3 for its syn-isomer; and

135821-74-8 for anti-isomer.

Category Industrial chemical
Common Use Additive flame retardant in electrical wire and cable coatings, plastic roofing materials, hard plastic connectors in TV and computer monitors and in polymeric systems such as nylon and polypropylene plastic.
Environmental Impact and Health Effects
  • Very persistent, long-term exposures in sediment and soil.
  • Very bio-accumulative
  • Potential for long-range transport, due to strong absorption to suspended solids/particulates when released to surface water.
  • Risk to operators, nearby residents
  • Neurotoxicity was observed in fish and earthworms
  • Endocrine modulative effects in fish and humans


Name UV-328
CAS RN 25973-55-1
Category Industrial chemical
Common Use
  • UV stabilizer in plastic shrink films (including food packaging), outdoor furniture, clear coat automotive finishes
  • Light stabilizer in coating, ABS resin, epoxy resin, fibre resin, PVC, unsaturated polyesters, polyacrylates and polycarbonates
  • UV absorber in Construction materials, fillers, surface treatment, adhesives, paint/lacquers/varnishes, printing inks, consumer fragrances, fabric/textile/leather products and inert pesticides
Environmental Impact and Health Effects
  • Causes damage to organs through prolonged or repeated exposure
  • May cause long lasting harmful effects to aquatic life
  • Persistent pollutant to environment
  • Very bio-accumulative
  • Low potential for biodegradation


Name Amitrole
CAS RN 61-82-5
Category Pesticide
Common Use Used as herbicide
Environmental Impact and Health Effects
  • Classified as probable human carcinogen
  • Risk to human health due to high risk of groundwater contamination by amitrole and its metabolites
  • Risk to terrestrial and aquatic organisms


Name Nonylphenol Nonylphenol Ethoxylates

The list of CAS RN is not exhaustive.

Category Industrial chemical/ Pesticide
Common Use Production of nonylphenol ethoxylates, plastics, resins, stabilizers in the polymer industry; phenolic oximes in the metal extraction industry
  • Adjuvants in pesticide formulations to enhance the absorption and efficacy of active ingredients in pesticides
  • Surfactant in cosmetics formulations and industrial, household cleaning products
  • Textile and leather processing
  • Cleaning of metal products
  • Emulsifiers in polymers (paints, resins, coatings)
  • Paper and pulp manufacturing
  • Fluxes, dyes, chemical baths in the manufacture of electronic circuit boards
  • Wetting agent in the development of photographic film
Environmental Impact and Health Effects
  • Persistent, low-moderately bio-accumulative and highly toxic to aquatic organisms
  • Potential risk to human health via occupational exposure – high levels of exposure may cause severe skin and eye irritation


Name Iprodione
CAS RN 36734-19-7
Category Pesticide
Common Use
  • Contact fungicide
  • Nematicide
  • Antifungal agrochemical Post-harvest dip, as a seed treatment or as a dip or spray at planting
Environmental Impact and Health Effects
  • Suspected of causing cancer
  • Very toxic to aquatic life with long lasting effects
  • Very toxic to aquatic life