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Disodium phosphate : ウィキペディア英語版 | Disodium phosphate |Section2= |Section7= |Section8= }} Disodium phosphate (DSP), or sodium hydrogen phosphate, is the inorganic compound with the formula Na2HPO4. It is one of several sodium phosphates. The salt is known in anhydrous form as well as forms with 2, 7, 8, and 12 hydrates. All are water-soluble white powders; the anhydrous salt being hygroscopic.〔( Physical data (pdf) )〕 ==Acid-base properties== The pH of disodium hydrogen phosphate water solution is between 8.0 and 11.0, meaning it is moderately basic: :HPO42− + H2O H2PO4− + OH−
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