Extension:Math/T167569

report
the example string $$\mathrm{HSO_4^-}$$ produces a minus which is not in superscript, while it works correctly with numbers before the minus (e.g. 2-) $$\mathrm{SO_4^{2-}}$$

suggestions
you could use HSO4-
 * Hmm, the ce is outdated and the chem-Author currently advises against the use of ce (Link), cheers, --Ghilt (talk) 13:48, 11 June 2017 (UTC)