Community Wishlist Survey 2019/Search/CAS numbers of chemical substances

  • Problem: Some chemicals have many alias, especially the organic ones. When we want to create a page for a chemical substance or search one, it is more convenient when a CAS redirect exists.
  • Who would benefit: Users who create/translate articles about chemistry; users who search them; small wiki editors and cross-wiki editors.
  • Proposed solution: The CAS number is unique to a certain chemical substance. When we search a CAS number, we can find a page that already exists. If it doesn't, in search results, we hope to find the substance in other wikis or Wikidata. It is helpful when we want to get information, create/translate a page, link the pages to other wikis or know if there is any corresponding image (category) on Commons.
  • More comments:
  • Phabricator tickets:
  • Proposer: Leiem (talk) 13:10, 30 October 2018 (UTC)


Note that CAS numbers are searchable in Wikidata; for example search on '15307-86-5' finds 'diclofenac'. That works of course if the CAS registry number property has been set for that substance. ArthurPSmith (talk) 17:25, 1 November 2018 (UTC)

I think this works because there were redirects from CAS numbers imported from some wikis as aliases; for all compounds it works using 'haswbstatement:P231=<CAS number>'. But I think this proposal is out of scope of Community Wishlist Survey; it's up to every single one Wikipedia language version whether or not they want to create such redirects. Wostr (talk) 18:39, 1 November 2018 (UTC)
The following tool may be used somehow:<CAS>, e.g. --Leyo (talk) 09:58, 28 November 2018 (UTC)


  •   Support Gehenna1510 (talk) 00:27, 17 November 2018 (UTC)
  •   Support It sounds like a more organized approach. Stevenmitchell (talk) 03:03, 17 November 2018 (UTC)
  •   Support Leiem (talk) 05:36, 17 November 2018 (UTC)
  •   Support ديفيد عادل وهبة خليل 2 (talk) 09:03, 17 November 2018 (UTC)
  •   Support Libcub (talk) 11:28, 17 November 2018 (UTC)
  •   Support JogiAsad (talk) 18:07, 17 November 2018 (UTC)
  •   Support Abductive (talk) 09:58, 18 November 2018 (UTC)
  •   Support Zabia (talk) 10:07, 18 November 2018 (UTC)
  •   Support Liuxinyu970226 (talk) 12:32, 18 November 2018 (UTC)
  •   Support It would be cool to have an interwiki prefix, that redirects to chemical substance Wikidata item based on CAS databse Dvorapa (talk) 19:06, 18 November 2018 (UTC)
  •   Support Mend My Way 23:44, 19 November 2018 (UTC)
  •   Support Vulphere 13:14, 20 November 2018 (UTC)
  •   Support Novak Watchmen (talk) 13:54, 21 November 2018 (UTC)
  •   Support Redirects to substance Wikidata item based on CAS databse is a good idea Dr. LooLets talk about it 16:03, 27 November 2018 (UTC)
  •   Support (talk) 16:32, 27 November 2018 (UTC)
  •   Support Minoo (talk) 21:46, 27 November 2018 (UTC)
  •   Support Ciao • Bestoernesto 01:07, 28 November 2018 (UTC)
  •   Support yeah! Cohaf (talk) 01:11, 28 November 2018 (UTC)
  •   Support --Der rausch (talk) 08:49, 28 November 2018 (UTC)