Abstract Chemical names can be so long that, when a manuscript is printed, they have to be hyphenated/divided at the end of a line. Many names already contain hyphens, but in some cases, using these hyphens as end-of-line divisions can lead to illogical divisions in print, as can also happen when hyphens are added arbitrarily without considering the ‘chemical’ context. The present document provides guidelines for authors of chemical manuscripts, their publishers and editors, on where to divide chemical names at the end of a line, and instructions on how to avoid these names being divided at illogical places. Readability and chemical sense should prevail when authors insert hyphens. The software used to convert electronic manuscripts to print can now be programmed to avoid illogical end-of-line hyphenation and thereby save the author much time and annoyance when proofreading. The Recommendations also allow readers of the printed article to determine which end-of-line hyphens are an integral part of the name and should not be deleted when ‘undividing’ the name. These Recommendations may also prove useful in languages other than English.

中文翻译：

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化学名称的行尾连字符（IUPAC 建议 2020）

摘要 化学名称可能很长，以至于在印刷手稿时，它们必须在一行的末尾用连字符/分隔开。许多名称已经包含连字符，但在某些情况下，使用这些连字符作为行尾分隔可能会导致印刷中出现不合逻辑的分隔，当不考虑“化学”上下文而随意添加连字符时也会发生这种情况。本文件为化学手稿的作者、他们的出版商和编辑提供了关于在行尾的化学名称分割位置的指南，以及如何避免在不合逻辑的地方分割这些名称的说明。当作者插入连字符时，可读性和化学意义应该占上风。用于将电子手稿转换为印刷品的软件现在可以编程以避免不合逻辑的行尾连字，从而为作者节省大量时间和校对时的烦恼。建议书还允许印刷文章的读者确定哪些行尾连字符是名称的组成部分，并且在“拆分”名称时不应删除。这些建议对于英语以外的其他语言也可能有用。