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The structures of solid magnesium citrates have been characterized by X-ray crystallography.In the 1:1 salt, only one carboxylate of citrate is deprotonated. It has the formula Mg(H 2 C 6 H 5 O 7) 2 The other form of magnesium citrate has the formula Mg(HC 6 H 5 O 7)(H 2 O) 2, consisting of the citrate dianion (both carboxylic acids are deprotonated). [1]
Speciation diagram for a 10-millimolar solution of citric acid. The violet curve corresponds to the trisodium citrate. As a conjugate base of a weak acid, citrate can perform as a buffering agent or acidity regulator, resisting changes in pH.
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Potassium citrate is rapidly absorbed when given by mouth, and is excreted in the urine. [4] Since it is an alkaline salt, it is effective in reducing the pain and frequency of urination when these are caused by highly acidic urine. [5]
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Triethyl citrate is an ester of citric acid.It is a colorless, odorless liquid used as a food additive, emulsifier and solvent (E number E1505) [4] to stabilize foams, especially as whipping aid for egg white. [5]
Calcium citrate is an intermediate in the isolation of citric acid from the fungal fermentation process by which citric acid is produced industrially. [2] The citric acid in the broth solution is neutralized by limewater, precipitating insoluble calcium citrate.
Ammonium ferric citrate (also known as ferric ammonium citrate or ammoniacal ferrous citrate) has the formula [NH 4]y[Fe x (C 6 H 4 O 7)].The iron in this compound is trivalent.All three carboxyl groups and the central hydroxyl group of citric acid are deprotonated.