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The Solubility of Octacalcium Phosphate at 37°C in the System Ca(OH)2-H 3PO4-KNO3-H2O

Chemistry Department, State University of New York at Buffalo, Buffalo, New York 14214

L. Perez

Chemistry Department, State University of New York at Buffalo, Buffalo, New York 14214

S.J. Zawacki

Chemistry Department, State University of New York at Buffalo, Buffalo, New York 14214

J.C. Heughebaert

Chemistry Department, State University of New York at Buffalo, Buffalo, New York 14214

G.H. Nancollas

Chemistry Department, State University of New York at Buffalo, Buffalo, New York 14214

The solubility product of octacalcium phosphate [Ca₄H(PO₄)₃ · 2.5H ₂O] has been determined in the system Ca(OH)₂-H₃PO ₄KNO₃-H₂O at 37°C in experiments involving a range of hydrodynamics, ionic strength, and equilibration time. A value of pK _so= 49.3 ± 0.2 was obtained for three different solid preparations by considering activity coefficients and ion-pair corrections.

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Journal of Dental Research, Vol. 62, No. 3, 398-400 (1983)
DOI: 10.1177/00220345830620031901


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