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Originally Posted by wikipedia Fluoride ions replace hydroxide ions in calcium hydroxyapatite, Ca5[(PO4)3OH], in teeth, forming calcium fluoroapatite, Ca5[(PO4)3F], which is more chemically stable and dissolves at a pH of 4.5, compared to 5.5 pH for calcium hydroxyapatite. |
Dont think it is toxic.. A campaign to make it toxic sounds a little like the one about dihydromonooxide.