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5 years ago in Chemistry , Inorganic Chemistry By Ritika

How does calcium phosphate behave in chemical reactions?

My lab work involves biomimetic mineralization, and calcium phosphate is our core material. While I know its basic formula, I often find its reactivity in aqueous and biological systems unpredictable. I need a more intuitive, experienced grasp of how it interacts with other ions and organic molecules under physiological conditions.

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By Deeksha S Answered 5 years ago

I've worked extensively with calcium phosphates in biomaterials. Their behavior is dominated by a delicate solubility equilibrium sensitive to pH, calcium, and phosphate ion concentration. You’ll see it readily precipitate as amorphous phases that slowly crystallize into hydroxyapatite, especially at physiological pH ~7.4. The key nuance is its surface reactivity: it actively undergoes ion exchange, easily incorporating carbonate or magnesium, and its surface charges facilitate strong interactions with proteins like collagen. I would recommend always considering the local ionic microenvironment, not just bulk solution conditions, to predict its behavior.

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