“…Generation of the mono-, di-, and trianionic forms at p K a values of 6.85, 10.91, and >12, respectively, was reported by Aoki et al in 2000 . Surprisingly, to date only 12 single-crystal X-ray structures of hydrogen-bonded complexes of the ordered isocyanurate ion are documented in the Cambridge Structural Database, CSD V5.36 (November, 2014) with May 2015 update. − …”