作为购买、修改或创建纳米形态的下游用户，我的义务是什么？

作为购买、修改或创建纳米形态的下游用户，我的义务是什么？

What are my obligations as a downstream user purchasing, modifying or creating nanoforms?

收到带有注册编号的安全数据表 (SDS) 后，下游用户将根据第 37(4) 条承担义务（REACH 第 39(1) 条）。作为下游用户，您会收到一份附有暴露场景的 SDS，适用于注册量超过 10 吨/年的危险物质（包括纳米形态）。收到 SDS 时，作为下游用户，您必须确定您的用途和/或使用条件是否在 SDS 中的暴露场景信息范围内，如果不是，则必须采取措施。当您处理纳米形态（您购买或自行创建）时，为确保用途得到充分覆盖，需要检查暴露场景中的用途和使用条件，以及您处理的纳米形态是否在扩展 SDS 的范围内。当下游用户对其购买的纳米形态进行表面处理或通过研磨非纳米形态创建纳米形态时（参见常见问题解答 1838），他们必须检查：• 所创建的纳米形态是否包含在收到的 SDS 中（参见问答 1831 和问答 1833）以及 • 用途（例如表面处理或研磨过程）是否包含在暴露场景中（参见问答 1834）。问答 1834 解释了当您得出结论认为您的用途或您创建的纳米形态未包含在内时应采取的措施。如果您的用途和您创建的任何纳米形态都在暴露场景中，则无需根据 REACH 采取进一步措施。记录您的检查和为得出结论而采取的措施，并根据执法机构的要求向其提供此信息。清晰的文档可以帮助您以透明的方式证明您的假设，并帮助当局更好地理解您在决策中应用的标准。适用于下游用户的 REACH 一般职责在下游用户指南中进行了描述。

Downstream user obligations under Article 37(4) are triggered upon receipt of a safety data sheet (SDS) with a registration number (Article 39(1) of REACH). As a downstream user, you receive an SDS with exposure scenarios attached for a hazardous substance (including nanoforms) registered above 10 tonnes/year.  When receiving an SDS, as a downstream user you must establish whether your use and/or your conditions of use are covered by the exposure scenario information in the SDS and take action if that is not the case. When you are dealing with a nanoform (that you have purchased or created yourself), ensuring that the use is adequately covered requires checking both the uses and conditions of use in the exposure scenario(s), and whether the nanoform you handle is covered by the extended SDS.  When downstream users apply a surface treatment to a nanoform they purchased or create a nanoform by milling a non-nanoform (see FAQ 1838), they must check whether:   •    the nanoform created is covered by the SDS received (see Q&A 1831 and Q&A 1833) and •    the use (e.g. the process of surface treatment or the milling) is covered by the exposure scenario(s) (see Q&A 1834).  Q&A 1834 explains the actions to be taken when you conclude that your uses or the nanoform you create is not covered. If your uses and any nanoform you create are covered in the exposure scenario, no further action under REACH is needed. Document your check and the actions you have taken to reach your conclusion and make this information available to enforcement authorities upon request. Clear documentation helps you to justify your assumptions in a transparent way and helps the authorities to better understand the criteria you have applied in your decisions. The general duties of REACH applicable to downstream users are described in the Guidance for downstream users.