Organotin compounds are a class of organic compounds in which tin atoms form covalent bonds with carbon atoms. These compounds have been widely used in fungicides, antifungal agents, catalysts, etc. in the past. However, they are considered persistent, bioaccumulative, and toxic substances that may be toxic to aquatic organisms and may act as immunotoxins. Therefore, major global markets have passed legislation to restrict the use of organotins in finished products. For example, Annex XVII of the REACH regulation sets a limit of 0.1% for dibutyltin, dioctyltin and trisubstituted organotin compounds. Different countries and regions may have slightly different limits for organotin compounds. The relevant standards of major countries and regions are briefly introduced below:

1. United States: The US Environmental Protection Agency has issued Chapter VI of TSCA, which restricts the use and discharge of certain organotin compounds during manufacturing, importing and processing.

2. EU: The EU REACH regulations have regulated certain organotin compounds management and regulation.

3. China: China’s national standards limit secondary The content of butyltin and tributyltin, while restricting the use of organotin compounds in toys for infants and young children.

4. Japan: Japan targets food packaging materials, toys and children’s products, etc. The use and standards of organotin compounds are restricted in various fields.

In summary, the use and Limits are different. When in use, it should be operated in accordance with the relevant local standards to avoid harm to the human body and the environment.