The Taiwanese Ministry of Environment (MOE) has launched  Phase 2 for the registration of existing chemical substances under the “Regulations for Registration of New and Existing Chemical Substances” . Following the successful completion of Phase 1, the new initiative will target 28 priority existing chemical substances,  with the aim of strengthening risk management while promoting non-animal testing methods and collaborative registration efforts through enhanced data collection and hazard evaluation. 

Highlights from Phase 1 

Phase 1 marked the first implementation of standard registration requirements for existing chemical substances under the Registration Regulations. Key outcomes included: 

• Phase 1,  designated 106 chemical substances for standard registration under Article 16 of the Registration Regulations. 

• Registrants submitted data covering basic uses, physicochemical properties, and toxicological characteristics. 

• MOE operated a helpdesk to provide guidance and support to registrants. 

• By 2024, over 2,000 data files had beenwere submitted by all major registrants, marking the completion of the first registration phase. 

• Data analysis informed other government agencies and helped MOE select substances for Toxic and Concerned Chemical Substances Management or for further hazard and exposure evaluation under Article 18. 

Phase 2 Registration Framework 

• Drawing on experience from Phase 1, stakeholder feedback, international practices, and Taiwan’s national regulatory context, MOE has designed the Phase 2 framework to: 

• Prioritize data collection for selected substances with publicly available international hazard data. 

• Fill data gaps through designated registrants submitting additional information. 

• Promote non-animal alternative testing methods. 

• Encourage joint registration to improve efficiency. 

• Under Phase 2, registrants are expected to focus particularly on exposure scenarios and use information to accelerate risk management and enable timely regulatory actions.  

• The framework emphasizes a public-private collaboration model to safeguard public health and environmental safety. 

Current Progress and Next Steps  

• MOE has preliminarily selected 28 existing chemical substances for Phase 2 priority data collection and hazard evaluation. 

• International hazard information for these substances is being compiled and analyzed. 

• The Registration Regulations are expected to be amended to incorporate the Phase 2 framework, designated substances, and required data elements. 

• MOE will consult stakeholders in accordance with legal procedures before finalizing the amendments. 

Accessing Documents and Providing Feedback 

• Download the Phase 2 Priority Chemical List via : 

• The Chemical Substance Registration Platform by navigating to→ “Regulations and Registration Data Download” → “Regulations/Guidelines/Instructions Download.” 

• Submit feedback or hazard iInformation through the : 

• Online form: https://forms.gle/jWazn3BK5BKY6gVy5 

• Contact for Inquiries: 

• Phone: +886-2-77306566 ext. 174 (Mr. Yunda Tsai) 

• Email: yunda.tsai@veolia.com 

Phase 2 Priority Chemical Substances 

MOE has preliminarily identified the following existing chemical substances for priority data collection and hazard evaluation under Phase 2. 

Notes: 

• This list is preliminary and does not constitute the final scope of substances for Phase 2 registration requirements. 

• MOE will pre-collect available international information and only require registrants to fill in data gaps. 

• Emphasis will be placed on registrants providing exposure scenarios and use information. 

• CAS numbers are the primary reference; English substance names are provided for guidance only.