Ammonium hypophosphates

Ammonium hypophosphates.—Excess of ammonia converts hypo-phosphoric acid in solution into normal ammonium hypophosphite,... 

When a solution of the normal salt is boiled until evolution of ammonia ceases, secondary ammonium hypophosphate, (NH4)2H2P206, separates in very stable rhombic crystals,2 melting at 170° C.3 It dissolves in 14 times its weight of water at ordinary temperature. 

Ion exchange on an acid column yields the crystalline dihydrate" H4P2O6.2H2O which is actually the hydroxonium salt of the dihydrogen hypophosphate anion [H30lJl(II0)P(0)2--P(0)2(0H)] " it is isostructural with the corresponding ammonium salt for which X-ray diffraction studies establish the staggered structure shown. 

CALCIUM NITRATE (10124-37-5) A strong oxidizer. Violent reaction with reducing materials. Forms shock-sensitive mixtures with organic contaminants. Incompatible with combustible materials (wood, cloth, oil, grease, etc.), organics, and other easily oxidizable materials, chemically active metals, aluminum nitrate, ammonium nitrate, cyanides, esters, phosphorus, sodium hypophosphate, thyocyanates. Con osive to many substances, including aluminum. 

In the structures of the acid condensed phosphates such as Na3HP207 9H2O, part of the H bond system consists of continuous chains of type (13.15a), while the hypophosphate salt Na3HP20g 9H2O contains chains of type (13.15b) (Figure 13.2). Ammonium acid hypophosphate (NH4)2H2P20g contains ladder like chains of type (13.15c) [10-12]. Crystalline NH4HP30,o H2O contains chains of type (13.15d). 

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