如果：i）我没有收到 SDS 或 ii）我收到了 SDS 但其中不包含暴露场景，我如何知道我创建的纳米形态是否受到供应商的保障？

如果：i）我没有收到 SDS 或 ii）我收到了 SDS 但其中不包含暴露场景，我如何知道我创建的纳米形态是否受到供应商的保障？

How do I know whether the nanoform I have created is covered by my supplier if: i) I did not receive an SDS or ii) I received an SDS but it does not contain exposure scenarios?

下游用户的义务在收到带有注册号的（扩展）SDS 时触发。可能存在法律不要求提供 SDS 的真实原因，例如因为该物质（和纳米形式）不属于 CLP 分类、该物质不属于 PBT/vPvB 分类和/或该物质不在 REACH 候选清单中。也可能存在 SDS 附件中未附暴露场景的真实原因，例如因为注册吨位低于 10 吨/年，或者该物质注册为仅作为严格控制条件下的中间体使用。如果您收到了没有 SDS 的物质（包括纳米形式），或者收到了 SDS 但没有暴露场景，而您认为应该收到一份，建议您正式以书面形式与供应商沟通，核实未收到 SDS 的原因并记录此操作。即使您的供应商不需要提供 SDS，如果您修改了购买的纳米形态，或者从物质的非纳米形态创建了纳米形态，您作为下游用户仍然可能根据 REACH 承担一些义务。例如，如果您创建的纳米形态符合危险品分类的标准（您可能需要进行测试以确定分类是否适用），则如果您满足 REACH 第 35 条规定的条件（或允许您的员工访问与 SDS 中提供的相同信息），则必须在公司层面（为您自己的员工）生成该纳米形态安全使用的 SDS。如果您将创建的纳米形态投放市场，成为供应商，您还必须根据 REACH 第 31 条向您的客户提供 SDS。根据第 34 条，您还需要告知上游供应商该纳米形态是危险品。如果您的供应商已提供安全数据表 (SDS)，但未涵盖您的用途的暴露场景，则 REACH 赋予下游用户向其供应商告知用途（包括纳米形态的创建或使用）的权利（REACH 第 37(2) 条）。您必须向供应商提供足够的信息，以便他们评估您的用途，如问答 1835 中所述。当供应商将该用途纳入其 REACH 注册时，供应商必须创建/更新其提供给下游用户客户的安全数据表 (SDS)，以使客户能够遵守 REACH 第 35 条和第 31 条的规定。

Downstream users’ obligations are triggered upon receipt of an (extended) SDS with a registration number. There may be genuine reasons where an SDS is not required to be supplied by law, e.g.  because the substance (and nanoforms) are not classified under CLP, the substance is not classified as PBT/vPvB, and/or the substance is not on the REACH Candidate List. There are also genuine reasons where there may be no exposure scenarios annexed to the SDS, e.g. because the registration tonnage is below 10 tonnes/year, or the substance is registered for use only as an intermediate under strictly controlled conditions. If you have been supplied a substance (including as a nanoform) without an SDS, or with an SDS but without an exposure scenario and you think you should have received one, it is recommended that you formally communicate with your supplier in writing to check the reason for not having received an SDS and document this action.  Where your supplier is not required to provide an SDS, you may still have some obligations under REACH as a downstream user if you modify the nanoform you have purchased, or you create a nanoform from a non-nanoform of the substance. If, for example, the nanoform you create fulfils the criteria to be classified as hazardous (you may need testing to determine whether classification applies), you must generate an SDS for the safe use of that nanoform at company level (for your own workers) if you meet the conditions set out in Article 35 of REACH (or grant access to your workers to the same information as provided in an SDS). If you put the nanoform created on the market, becoming a supplier, you also have to provide an SDS to your customers according to Article 31 of REACH. You also need to inform upstream to your supplier, according to Article 34, that the nanoform is hazardous. Where your supplier has provided an SDS but no exposure scenario covers your use(s), REACH gives a downstream user the right to make a use (including the creation or use of a nanoform) known to their supplier (Article 37(2) of REACH). You must provide sufficient information to your supplier to enable them to assess your use, as described in Q&A 1835. When the supplier includes that use in their REACH registration, the supplier must then create/update the SDS they provide to their downstream user customers, to enable the customers to comply with REACH Articles 35 and 31.