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On October 4, 2022, Taiwan’s EPA issued a notice to commence a period of public comments for the Draft Amendments to Categories and Management of Handling for Toxic Chemical Substance (hereinafter referred to as the Draft Amendments) under Taiwan TCSCA. The Draft Amendments proposed to update the toxicity classification and handling requirements of 10 existing organotin compounds and add CAS numbers for 4 new organotin compounds. Once approved, a grace period of 1~2 year(s) will be provided for enterprises to comply with the corresponding requirements. Comments are welcome before November 3, 2022.
Organotin compounds are endocrine disrupters. They are widely used as polyvinyl chloride (PVC) stabilizers, biocides, or anti-fouling paints, and have given rise to ubiquitous environmental contamination. Currently, under Taiwan TCSCA, there are 35 organotin compounds designated as toxic chemicals by Taiwan EPA. In line with international regulations, Taiwan EPA proposes more use prohibitions on more substances to strengthen the source control and safety use of organotin compounds.
Proposed updates are summarized as below:
Updating toxicity classification of the following 10 organotin compounds, as well as their handling requirements.
Chemical information | Toxicity Classification | Handling Requirements | ||
Chemical name | CAS No. | Current | Proposed | Prohibited uses Manufacture of anti-fouling paint; Anti-fouling system (to be added); Manufacture of biocides (to be added). Permitted uses
Many permitted uses are proposed to be deleted. E.g., anti-fouling paint corrosion protection and anti-fouling paint sterilization. |
Tributyltin oxide / Bis(tributyltin)oxide | 56-35-9 | Class 1 | Class 1, 3, 4 | |
Triphenyltin hydroxide | 76-87-9 | Class 1 | Class 1, 3, 4 | |
Tributyltin acetate | 56-36-0 | Class 4 | Class 1, 3 | |
Tributyltin bromide | 1461-23-0 | Class 4 | Class 1, 3 | |
Tributyltin chloride | 1461-22-9 | Class 4 | Class 1, 3 | |
Tributyltin fluoride | 1983-10-4 | Class 4 | Class 1, 3, 4 | |
Tributyltin hydride | 688-73-3 | Class 4 | Class 1, 4 | |
Triphenyltin bromide | 962-89-0 | Class 4 | Class 1 | |
Triphenyltin acetate | 900-95-8 | Class 4 | Class 1, 3, 4 | |
Triphenyltin chloride | 639-58-7 | Class 4 | Class 1, 3 | |
Note: For Class 1, Class 2 and Class 3 toxic chemical substances under Taiwan TCSCA, the authority may restrict or prohibit their handling. Prior to the handling of Class 4 toxic chemical substances, toxicity and relevant information of these substances shall be reported to the relevant authorities. Such handling shall be performed upon permission in compliance with authorized items.
Addition of CAS numbers for four organotin compounds (Appendix Table 1).
Chemical name | CAS No. | Toxicity Classification | According to the Draft Amendments, relevant handling requirements for these 4 organotin compounds should be completed within the specified deadlines. Click here to learn more. |
Triphenyl-α-naphthyltin | 81134-67-0 | Class 4 | |
Tripropyltin fluoride | 682-32-6 | Class 4 | |
Tritolyltin bromide | 58436-46-7 | Class 4 | |
Tritriphenylstannyl methane | 50485-45-5 | Class 4 |
Besides, the Draft Amendments also expand the types of asbestos subject to ban on the manufacture, import, sell and use, i.e.,:
Crocidolite;
Amosite;
Anthophyllite (to be added) ;
Actinolite (to be added);
Tremolite (to be added);
Chrysotile (to be added).
Except for R&D, testing and education applications, the Draft Amendments delete all the permitted uses of asbestos (as the corresponding exemption period is going to expire). Taiwan EPA also issued an import prohibition covering all types of asbestos-containing products, see ChemLinked News: Taiwan to Prohibit Import of Products Containing Asbestos.
