Phosphoric acid (H 3 PO 4 ) shows a much stronger effect than the other evaluated acids. At proton concentrations above 40 µmol/g CAC , the inhibition time is higher than 120 min. The combined formation of Al(OH) 3 and hydroxylapatite suggested by the modeling is likely to strongly influence the dissolution rate of CA. The supersaturation state of the solution may limit the transport of both aluminum and calcium from the CA to the solution, which would further slow down the dissolution compared to a system like HCl, where only aluminum transport would be limited. This could explain why this acid differs from the other acids with a much stronger dissolution inhibition.