Orthocarbonic Acid - Orthocarbonate Anions

Orthocarbonate Anions

By loss of one through 4 protons, orthocarbonic acid could yield four anions: H₃CO₄−, H₂CO₄2−, HCO₄3−, and CO₄4−.

As of 2002, salts of these anions had yet to be observed. However, theoretical studies suggest that Na₄CO₄ might be stable