Magnesium phosphate, neutral

Synonyms magnesium orthophosphate, neutral magnesium phosphate, tri-... 

Hard-burned magnesias may be used in a variety of appHcations such as ceramics (qv), animal feed supplements, acid neutralization, wastewater treatment, leather (qv) tanning, magnesium phosphate cements, magnesium compound manufacturing, fertilizer, or as a raw material for fused magnesia. A patented process has introduced this material as a cation adsorbent for metals removal in wastewater treatment (132). 

Medicine pain killer and fever reducer (magnesium acetylsalicylate) antacid to neutralize stomach acid (magnesium hydroxide magnesium phosphate magnesium silicate) laxative to loosen the bowels... 

Magnesium Phosphate, Trlbasic. Neutral mag-nesium phosphate tertiary magnesium phosphate trimagnesium phosphate. Mg308P, mol wt 262.86. Mg 27 74%, O 48,70%, P 23.56%. Mg3(PO,h. Oct ahyd rate occurs in nature as the mineral toil ferrite. 

Characters.—White powder, very slightly soluble in water, but readily dissolves in acids without effervescence. Its solution in hydrochloric acid, when neutralized by a mixed solution of ammonium chloride and ammonia, gives a copious crystalline precipitate (ammonio-magnesium phosphate) when hydrogen-di-sodium phosphate is added to it. Dissolved in nitric acid, it should give no precipitate with barium chloride, showing the absence of sulphate, and, when neutralized with a mixture of ammonium chloride and ammonia, it should yield no precipitate with ammonium oxalate, indicating its freedom from calcium. 

Synonyms cas 7757-86-0 magnesium phosphate, neutral trimagnesium phosphate... 

Ammonium Beryllium Phosphate.— Rossler (1878 9) has shown that a crystalline precipitate, similar to ammonium magnesium phosphate can be produced by adding an excess of ammonium phosphate to a beryllium salt, adding hydrochloric acid and just neutralizing with ammonia, but states that this precipitate varies in composition. M. Austin (1899 8) has also worked with this precipitate in an attempt to obtain an analytical method for beryllium, but agrees that the results are inaccurate. 

Magnesium phosphate neutral. See Magnesium phosphate tribasic... 

To determine the end-point, compare the urine being titrated with an nntitrated specimen in a similar test tube. As soon as a colour difference can be detected the titration is complete. Shortly before the end-point is reached, a precipitate of calcium and magnesium phosphate may appear in the solution. This is due to the conversion of soluble acid phosphate into insoluble phosphate by action of the alkali. Folin advocates the precipitation of the calcium by the addition of neutral potassium oxalate before starting the titration. 

Magnesium ion is usually involved (for charge neutralization ) where high-energy phosphate is moved from one molecule to another by an enzyme, i.e., the metabolically active form of ATP is usually the magnesium chelate. 

The nucleophilic reactions of acetyl phosphate are catalyzed by cations such as magnesium (26), calcium (15, 32), and even lithium (30). Most of the reactions involve catalysis of hydrolysis. Calcium ion catalyzes a neutral as well as a... 

In the 1960s, Schwartz described the phosphorylation of adenosine with trimetaphosphate to yield 2 - and 3 -AMP. The strong alkaline conditions used for this transformation were not likely to occur on the primitive Earth [137]. Similarly, all natural ribonucleosides were phosphory-lated to corresponding 2 - and 3 -nucleotide monophosphates with sodium trimetaphosphate at high pH and temperature [138,139]. When the reaction was performed under similar experimental conditions at lower pH, 2/,3/-cyclic phosphate nucleotides were recovered as the major products [140]. Magnesium ion catalyzes this transformation in neutral water solution [141]. 

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