Talk:Chemical purity

Chemistry Mid‑importance

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Materials Mid‑importance

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more grades

No spectroscopic grade or photographic grade? As well as I know, spectroscopic grade is highest, as much can appear in spectroscopy, and is usually only needed in small amounts. Photographic grade is low, almost technical grade, except it can't have a few chemicals that interfere with photographic processing. Gah4 (talk) 23:02, 14 September 2020 (UTC)[reply]

Wiki Education assignment: CHEM 300

This article was the subject of a Wiki Education Foundation-supported course assignment, between 8 January 2024 and 26 April 2024. Further details are available on the course page. Student editor(s): Ooogaboooga 101 (article contribs). Peer reviewers: Norquay917, Santory300.

— Assignment last updated by RS UBC800 (talk) 22:08, 5 April 2024 (UTC)[reply]