Triple superphosphate 3768031 143624786 2007-07-10T01:01:20Z Chem-awb 4806773 Removed {{ChemicalSources}} as obsolete '''Triple Superphosphate''' is a [[fertilizer]] produced by the action of concentrated [[phosphoric acid]] on ground [[phosphate]] rock. :3Ca<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>&middot;CaF<sub>2</sub> + 4H<sub>3</sub>PO<sub>4</sub> + 9H<sub>2</sub>O --> 9Ca(H<sub>2</sub>PO<sub>4</sub>)<sub>2</sub> + CaF<sub>2</sub> The active ingredient of the product, monocalcium phosphate, is identical to that of [[superphosphate]], but without the presence of [[calcium sulfate]] that is formed if [[sulfuric acid]] is used instead of [[phosphoric acid]]. The phosphorus content of triple superphosphate (17 - 23% P; 44 to 52% P<sub>2</sub>O<sub>5</sub>) is therefore greater than that of superphosphate (7 - 9.5% P; 16 to 22% P<sub>2</sub>O<sub>5</sub>). Triple superphosphate was the most common phosphate (P) fertilizer in the USA until the 1960s, when [[ammonium phosphate]]s became more popular. It is produced in granular and nongranular form and is used both in fertilizer blends (with [[potassium]] and [[nitrogen]] fertilizers) and by itself. ==References== Havlin, J.L., J.D. Beaton, S.L. Tisdale, and W.L. Nelson. 2005. Soil Fertility and Fertilizers. 7th edn. Pearson Prentice Hall, N.J. ==External links== [[Category:Calcium compounds]] [[Category:Phosphates]] [[Category:Agricultural chemicals]] {{inorganic-compound-stub}}