中文内容由 Google Cloud Translation 自动生成，仅供参考；请以英文原文为准。问答资料来自欧盟化学品管理局（ECHA）官方网站。
答案（中文）
在大多数情况下，如果您想了解某种物质的注册用途，您必须询问供应链上游的其他参与者。为此，您需要描述该物质在物品中的作用、该物质被纳入物品的过程以及物品的类型。此描述应与用途描述系统一致。安全数据表 (SDS) 非常有用，因为它们包含供应商已知的该物质或混合物的用途信息。如果 SDS 还包含注册号，则根据 SDS 中用途描述的准确性，可能可以推断出该物质的某种用途已被注册。但是，如果您有疑问，应该向供应链上游的实际注册人寻求确认。或者，您可以识别并询问任何供应链中该物质的制造商或进口商，他们已注册该物质的用途，或者他们是否已将其注册为特定用途。识别某种物质的制造商和进口商的一个好方法是，在物质信息交换论坛 (SIEF) 内针对该物质发起相应的请求，前提是您已预先注册该物质或已加入 SIEF 并成为数据持有者。更多信息，请参阅《物品中物质要求指南》：http://echa.europa.eu/documents/10162/13632/articles_en.pdf
Answer (EN)
In most cases, if you want to find out for which uses a substance has been registered, you will have to ask other actors up your supply chain.
For this purpose, you need to describe the function of the substance in the article, the process by which the substance is included in the article and into which type of article. This description should be in line with the use descriptor system.
Safety data sheets (SDSs) can be helpful as they contain information on uses of the substance or mixture as far as they are known by the supplier. If the SDS also includes a registration number, it may be possible, depending on the accuracy of the use descriptions in the SDS, to conclude that a particular use of this substance has already been registered. However, if you have doubts, you should seek confirmation from the actual registrant up the supply chain.
Alternatively, you could identify and ask manufacturers or importers of that substance from any supply chain for the uses they have registered this substance for, or whether they have registered it for a particular use.
A good way to identify manufacturers and importers of a substance is to launch a corresponding request within the substance information exchange forum (SIEF) for this substance, provided that you have pre-registered the substance or joined the SIEF as a data holder.
For further information see the Guidance on requirements for substances in articles:
http://echa.europa.eu/documents/10162/13632/articles_en.pdf