Template talk:Chembox

See also: {{Navbox Chembox}} (talk), {{Drugbox}} (talk)

Template-protected edit request on 14 March 2026

We are students from Radboud University taking the course "Toxicology (NWI-MOL054)", we have a project to choose one substance and write about it on Wikipedia. We kindly ask for access to edit the chemical infobox so the assignment can be completed. Mariamaina (talk) 17:03, 14 March 2026 (UTC)

 Not done: requests for decreases to the page protection level should be directed to the protecting administrator, or to Wikipedia:Requests for page protection if the protecting administrator is not active or has declined the request. Zackmann (^{Talk to me}/_{What I been doing}) 18:17, 14 March 2026 (UTC)

Well actually, this isn't even the right approach to the goal. This template is just a tool that actual substance articles use to format the infobox. It isn't an article itself and does not contain information about any specific substance itself. The details that it displays are written in the article page. DMacks (talk) 18:30, 14 March 2026 (UTC)

Formatting issue with article names containing apostrophes

For e.g. Tröger's base, template currently displays title like this:

Tröger
'
s base

Thanks for any help with this, and happy editing -- Middle 8 ^{Neurodivergence} • _(s)talk 19:44, 14 June 2026 (UTC)

@Middle 8: Are you using mobile/tablet? On my end, I don't see this issue unless I switch to mobile view. I recall a similar problem with punctuation in infoboxes on mobile which someone reported elsewhere. In that case, the issue was related to MOS:PSEUDOLISTs, and was easily fixed by using {{ubl}} instead of <br>. Your finding suggests the problem is more extensive. I'm fairly sure this is a deeper technical problem and isn't necessarily anything to do with {{Chembox}} specifically.

See Wikipedia:Village pump (technical)/Archive 230 § Punctuation on separate lines for the previous case. I've posted a comment on phab:T428472 (bug report) noting Tröger's base. – Scyrme (talk/solidarity) 21:19, 14 June 2026 (UTC)

Thank you kindly Scyrme for your follow-up on this, and yes, I encountered the problem in mobile view; I should've mentioned that. In desktop view on my smartphone (Android), the issue does not appear, FWIW. Best regards & happy editing -- Middle 8 ^{Neurodivergence} • _(s)talk 22:08, 14 June 2026 (UTC)

Bug: not all local images are tracked

When an article has a Chembox with an image (|ImageFile=, etc.) that is locally uploaded (enwiki) rather than commons, the article is placed in Category:Chemical pages containing a local image. However, there are pages missing from that cat.

Article	Local image	Article is in cat
Benzene	-	no (CORRECT)
Olympicene	File:Olympicene AFM.jpg	yes (CORRECT)
Curium(III) chloride	File:Curium(III) chloride.jpg	no (BUG)

A trigger appears to be an image whose name contains certain characters that get URL encoded by {{filepath}}, a parser function that generates the URL of the image itself. That URL is then mis-parsed by the {{#titleparts}} magic word in chembox's {{ParmPart}} helper function. The following change seems to fix it:

−

{{#ifeq:/{{{2|}}} |{{#titleparts:/{{{2|}}} |1|{{#expr:1+{{{1|1}}}}}}} | |{{#titleparts:/{{{2|}}} |1|{{#expr:1+{{{1|1}}}}}}} }}<noinclude>{{documentation}}</noinclude>

+

{{#ifeq:/{{{2|}}} |{{#titleparts:/{{Urldecode|{{{2|}}}}} |1|{{#expr:1+{{{1|1}}}}}}} | |{{#titleparts:/{{Urldecode|{{{2|}}}}} |1|{{#expr:1+{{{1|1}}}}}}} }}<noinclude>{{documentation}}</noinclude>

It's hard to come up with a decent test harness. Anyone wanna comment on the diagnosis or proposed solution before I unleash it? DMacks (talk) 03:22, 30 September 2026 (UTC)