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。
Answer (EN)
ECHA utilises all available information for grouping substances. The algorithms use all available identifiers in all registrations, compositions and reference substances in IUCLID dossiers. Hence, it is quite likely that all structurally related substances are identified, to the extent the submitted information allows to do so. However, for certain substances, such as inorganic UVCBs, substance grouping may be less accurate and may require additional manual effort for fine tuning the approach and manually verifying the accuracy of the results.