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Diamidodiphosphoric Acid, (NH2)2P2O3(OH)2

Diamidodiphosphoric Acid, (NH2)2P2O3(OH)2, was prepared by the action of phosphoryl chloride at low temperatures on ammonia in the presence of some water, thus

2NH3 + 2POCl3 + 3H2O = 6HCl + (NH2)2P2O3(OH)2

It may also be obtained by several other reactions. The diammonium salt has been prepared in the crystalline state and various other salts as precipitates.
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