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The Solubility of Octacalcium Phosphate at 37°C in the System Ca(OH)2-H 3PO4-KNO3-H2O
L.J. Shyu
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.
Journal of Dental Research, Vol. 62, No. 3,
398-400 (1983)
DOI: 10.1177/00220345830620031901

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