Potassium/sodium pyrophosphate

Curiously enough, tetrabasic pyrophosphoric acid readily forms quaternary or normal pyrophosphates, say Na4P207, etc. and the secondary pyrophosphates, say Na2H2P207, but not the primary and tertiary salts. There is even some doubt if the ternary salt, Na3HP207, and the primary salt, NaH3P207, have been prepared. T. Salzer reported the former in 1894 and H. Giran, the latter in 1903. Abortive attempts have been made to prepare a pair of isomeric potassium sodium pyrophosphates ... 

Several agents deUvered via toothpaste inhibit the accumulation of dental calculus. Pyrophosphate salts, with or without a methoxyethylene—maleic acid copolymer, and zinc salts have given positive results in clinical trials (5). Pyrophosphates were added as potassium or sodium pyrophosphate or mixtures at a level of about 2—6%. The zinc salt was zinc citrate [546-46-3] (0.5—2.0%) or zinc chloride [7646-85-7] (2.0%). The products all contained fluoride in addition to the calculus inhibitor. The anticaries activity of the fluoride was not compromised (6). 

The solution of lithium carbonate in melted potassium carbonate gives a solid double salt whose formula is KLiCXlj the temr perature of the indifferent point is 616 C. The melted mixture of sodium borate and sodium pyrophosphate gives a double salt formed by the union of one molecule of each of the simple salts the temperature of the indifferent point is about 960 C. Besides these examples furnished by melted salts, we may... 

Properties White powder. D (1) 3.71, mp 1196C. Soluble in solutions of potassium or sodium pyrophosphate insoluble in water. 

In Experiment 1, 9.28 moles of allyl acetate per liter of latex was emulsified with 0.087 mole of sodium lauryl sulfate, buffered with 0.45 mole of sodium pyrophosphate, and initiated with 0.0920 mole/liter of potassium persulfate. In experiment 2, again 9.28 moles of allyl acetate per liter of latex was polymerized in the presence of 0.087 mole of sodium lauryl sulfate, 0.45 mole of sodium pyrophosphate, and 0.366 mole/liter of potassium persulfate. Since the MW of allyl acetate is 100, the above information implies that the basic monomer to water ratio is an unlikely 928 gm of monomer to approximately 70 gm of water. If indeed these are the experimental facts, then the fact that the polymers produced resembled those produced in bulk or in solution is not surprising. A reaction mixture consisting of nearly 93% pure monomer, naturally would be expected to produce a polymer similar to one produced from a pure (i.e., bulk) monomer and not one similar to an emulsion polymer. Compositions of less than 60% monomer in water would ordinarily be expected to produce latices. Perhaps the data in question refer to a ratio of 9.28 moles of monomer to one liter of water. 

Calcium citrate Calcium gluconate Calcium hydroxide Calcium lactate Calcium phosphate monobasic anhydrous Calcium phosphate monobasic monohydrate Calcium phosphate tribasic Calcium pyrophosphate Disodium citrate Glycine Hydrochloric acid Potassium acetate Potassium alum dodecahydrate Potassium citrate Potassium phosphate Potassium phosphate dibasic Potassium phosphate tribasic Potassium sodium tartrate Potassium sodium tartrate tetrahydrate Potassium tripolyphosphate Sodium acid pyrophosphate Sodium alum Sodium citrate Sodium fumarate Sodium lactate... 

Potassium sodium tartrate tetrahydrate Potassium tripolyphosphate Sodium acetate anhydrous Sodium acid pyrophosphate Sodium calcium polyphosphate Sodium carbonate Sodium citrate Sodium diacetate Sodium gluconate Sodium hexametaphosphate... 

Monosodium hydrogen phosphate Disodium monohydrogen phosphate Trisodium phosphate Sodium pyrophosphate Disodium dihydrogen phosphate Sodium triphosphate Sodium polyphosphate Sodium trimetaphosphate Sodium aluminium phosphate Potassium dihydrogen phosphate Dipotassium hydrogen phosphate Potassium triphosphate Potassium polyphosphate... 

Fig. 10. Exchange reactions. A. Between AcCoA and H-CoA. The reaction mixture contained 0.01 ml of H-CoA solution (0.027 /imole), 0.07 ml of 4 X 10 M AcCoA (2.8 nioles) prepared in water, 0.10 ml of DEAE-cellulose enzyme fraction (30 lig protein) from a rapid inactivator human and 0.8M potassium borate buffer, pH 8.0 in a total volume of 0.27 ml at 27 °. Aliquots of 0.02 ml were removed and immediately mixed with 0.05 ml of 3 X 10" M DTNB dissolved in 0.05 M sodium acetate buffer, pH 5.0 (0.15 Mmoles) at 4° to stop the reactioa Aliquots of 0.01 ml were then removed from this mixture, and the Ac- H-CoA was separated from the H-CoA on DEAE-cellulose ion-exchange paper. The Ac- H-CoA area was cut out, placed in a counting vial, eluted with 0.02 ml of 0.6 N HCl and counted. Complete reaction mixture (o) mixture without AcCoA ( ) mixture with enzyme previously inactivated b y heating at 55° for 15 min (A). B. Between H-aniline and acetanilide. The reaction mixture contained 0.005 ml of H-aniline dissolved in water (115 mC/mmole, 0.0019 /tmole), 0.20 ml of 3 X lO M acetanilide dissolved in 0.1 M sodium pyrophosphate buffer, pH 8.0 (6.0 Mmoles), 0.10 ml of DEAE-cellulose enzyme fraction from a rapid inactivator human (30 Mg protein) and 0.10 M sodium pyrophosphate buffer, pH 8.0, in a total volume of 0.305 ml at 27°. Aliquots of 0.01 ml were removed, placed on CM-cellulose strips, and treated with 0.005 ml of acetone-absolute ethanol (1 1) to stop the reaction. The H-acetanilide was separated from the H-aniline by eluting the strips with glycine buffer at pH 2.8. The H-acetanilide area was cut out, placed in a count-...

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