Triammonium phosphate

Triaminotriphenyl methane soluble dyes, 7 373t Triammonium phosphate, 18 835 Triamterene, 5.T68... 

Both compounds are soluble in H20 insoluble in alcohol or ether. A third compound, triammonium phosphate (NH4)3P04, does not exist under normal conditions because, upon formation, it immediately decomposes, losing NH3 and reverting to one of the less alkaline forms. 

W-260 Acetonitrile / triammonium phosphate C, UDC, CDC, DC, LC, and their glycine and taurine conjugates 130 Immobilized 3a-HSD fluorescence detection of NADH Serum 1-4 pmd H8... 

Ammonium Phosphate. Ammonium phosphates have a long history of use as a fertilizer. They are not as easily leached from the soil as ammonium nitrate, but cannot be made in high nitrogen concentrations. There are three forms of ammonium phosphate monoammonium phosphate (MAP, NH4H2P04), diammonium phosphate (DAP, [NH4]2HP04), and triammonium phosphate (TAP, [NH4]3P04). Unfortunately, triammonium phosphate is unstable and loses ammonia easily. Ammonium phosphates are produced by reacting ammonia with phosphoric acid (Reaction 3.8). 

It is important to remember that numerical prefixes are not used in the names of ionic compounds. It would be incorrect to name (NH4)3P04 triammonium phosphate. The only time you would see a numerical prefix is if it is part of the name of a polyatomic ion, as in the d/hydrogenphosphate ion. 

Example 6. Compare the two contrasting polyprotic systems, 0.010 M triammonium citrate and triammonium phosphate (a hypothetical compound, as we shall see). At ionic strength 0.1 M at 25°, we have the following pK values ... 

Tetraammonium diphosphate loses ammonia slowly and changes to (NH4)3HP207 in dry air and to (NH4)3HP207 H20 in moist air.11 In dilute solution, it hydrolyzes by a first-order reaction to phosphate.12 The rate of hydrolysis is slow in neutral and weakly basic solutions but increases with increasing acidity of the solution. Tetraammonium diphosphate is converted to both anhydrous and hydrated di- or triammonium acid salts by dissolving it in water, adjusting to the proper pH and temperature, and adding ethanol to induce crystallization.11... 

Triammonium citrate phosphate destroying agent was observed to be more stable to changes in pH and more effective at destroying phosphate interference at low concentration of phosphate. 

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