Primary calcium phosphate

Higashi, S., Yamaga, R., Satomura, A., Anzai, M., Nishijima, K., Kubo, M. Kawakami, R. (1972). Studies on water-settable cements. Part 11. Preparatory experiments on water-settable phosphate cement and properties of water-settable primary calcium phosphate. Journal of the Nihon University School of Dentistry, 14, 58-63. 

Calcium Biphosphate Calcium Acid (or Super) Phosphate Primary Calcium Phosphate ... 

Primary calcium phosphate [Ca(H204)] is used in the manufacture of certain baking powders. In the presence of moisture, the acid phosphate reacts with sodium hydrogen carbonate (another constituent of such powders) to produce gaseous carbon dioxide, which causes the dough to rise. 

The utilization of tricalcium phosphate therefore requires its conversion into a soluble salt. This is accomplished by treating the normal phosphate with dilute sulfuric acid (lead-chamber acid), thereby producing the soluble primary calcium phosphate ... 

Calcium Phosphate Monobasic. Acid calcium phosphate calcium biphosphate monocalcium orthophosphate monocalcium phosphate primary calcium phosphate "calcium superphosphate". CaH4OtP] mol wt 234.06. Ca 17.12%, H 1-72%, O 54.69%, P 26.47%. CaiHjPO ), Commercial prepn for fertilizers by treating pulverized phosphate rock with HjSO. or H2POt Faith, Keyes St Clark s Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds, (Wiley-Interscience, New York, 4th ed., 1975) pp 191-200. Laboratory prepn from CaCO, and H,P04 Jensen, Kath-ley, lnorg. Syn. 4, 18 (1953). 

Materials Sodium bicarbonate, potassium acid tartrate, sodium aluminium alum, primary calcium phosphate, starch, commercial baking powder. 

Eepeat the experiment using primary calcium phosphate. 

Monobasic calcium phosphate, Ca(H2P04)2, is also known as calcium hypophosphite, calcium biphosphate, acid calcium phosphate, monocalcium orthophosphate, and primary calcium phosphate. It usually exists in the form of the hydrate Ca(H2P04)2-H20. It decomposes when heated to 2oo°C (400°F)... 

Calcium phosphate, dibasic (calcium biphosphate, acid calcium phosphate, and primary calcium phosphate) n. CaH4(P04)2-H2O. A stabilizer. 

Syntmyms (a) MCP Monocalcium Phosphate, Monohydrate Acid Calcium Phosphate, Calcium Superphosphate Calcium Biphosphate Primary Calcium Phosphate (b) DCP Dicalcium Phosphate (Anhydrous or Dihydrate) Dibasic Calcium Phosphate Calcium Monohydragen Phosphate Secondary Calcium Phosphate (c) TCP Calcium Phosphate Tribasic (d) Calcium Pyrophosphate Chemical Formula (a) CaH4(P04)2Hj0 (b) CaHP04 or... 

Phosphates. The primary constituent of phosphate rock is fluorapatite, Ca3FP2022- Industrial phosphates including phosphate fertilizers (qv), phosphoric acid, and calcium phosphates (11) (see Phosphoric acid and the phosphates) are obtained from the large deposits of fluorapatite found in Florida in the United States, and in Morocco. Because phosphate rock is too insoluble to be useful as a fertilizer, it is converted to superphosphate [12431 -88-8] Ca(H2P0 2 CaSO, by H2SO and to triple superphosphate [7758-23-8] by H PO (l )- Phosphoric acid may also be... 

Amino acid concentration. Primary factor that affects pH of the PN admixture the higher the concentration of amino acids, the higher is the amount of calcium and phosphate that can remain in solution (phosphate likely binds with amino acids and less is available to bind with calcium), therefore lowering the risk of calcium-phosphate precipitation. 

A primary concern when administering PN is safety. The FDA published a safety alert in 1994 in response to two deaths associated with TNA infusion.16 Autopsy reports from these patients revealed diffuse microvascular pulmonary emboli I containing calcium-phosphate precipitates. The FDA provided... 

Naturally occurring calcium phosphate is the primary resource utilized in producing fertilizer. It is found in many places, and it is available in almost unlimited quantity. Converting this insoluble... 

The phosphate manufacturing and phosphate fertilizer industry includes the production of elemental phosphorus, various phosphorus-derived chemicals, phosphate fertilizer chemicals, and other nonfertilizer phosphate chemicals [1-30], Chemicals that are derived from phosphorus include phosphoric acid (dry process), phosphorus pentoxide, phosphorus penta-sulfide, phosphoms trichloride, phosphorus oxychloride, sodium tripolyphosphate, and calcium phosphates [8]. The nonfertilizer phosphate production part of the industry includes defluori-nated phosphate rock, defluorinated phosphoric acid, and sodium phosphate salts. The phosphate fertilizer segment of the industry produces the primary phosphorus nutrient source for the agricultural industry and for other applications of chemical fertilization. Many of these fertilizer products are toxic to aquatic life at certain levels of concentration, and many are also hazardous to human life and health when contact is made in a concentrated form. 

MW 234.06 readily forms monohydrate, Ca(H2P04)2 H2O Synonyms monocalcium orthophosphate calcium biphosphate primary calcium phospate, calcium dihydrogen phosphate. 

T. Graham found that a soln. of sodium dihydrophosphate gives a yellow precipitate of Ag3P04 with silver nitrate and two-thirds of the nitric acid is set free. W. Foster has measured the conductivity of dil. soln. of potassium dihydrophosphate, and F. Kohlrausch the specific conductivity. A. Joannis found that dry sodium or potassium dihydrophosphate did not absorb dry ammonia gas when the former salt was in contact with the liquid for 7 days at room temp, only insignificant amounts were absorbed. W. Windisch and W. Dietrich studied the action of boiling soln. of primary potassium phosphate with increasing proportions of calcium hydro-carbonate, and found the precipitates contained increasing proportions of tertiary calcium phosphate, with some entrained alkali. 

Strain rate sensitivity of (or the effect of press speed on) the formulation is of primary concern in scale-up. Whether the product development work was performed on a single-stroke press or a smaller rotary press, the objective in operations will be to increase efficiency, in this case the tablet output rate and, therefore, the speed of the press. For a material that deforms exclusively by brittle fracture, there will be no concern. Materials that exhibit plastic deformation, which is a kinetic phenomenon, do exhibit strain rate sensitivity, and the effect of press speed will be significant. One must be aware that although specific ingredients (such as calcium phosphate and lactose) may exhibit predominately brittle fracture behavior, almost everything has some plastic deformation component, and for some materials (such as microcrystalline cellulose) plastic deformation is the predominant behavior. The usual parameter indication is that target tablet hardness cannot be achieved at the faster press speed. Slowing the press may be the only option to correct the problem. 

The primary purpose of phosphate addition is to precipitate the hardness constituents. The calcium reacts with phosphate under the proper pH conditions to precipitate calcium phosphate as calcium hydroxyapatite, Cain(P04)fi(0H)2. This is a flocculent precipitate that tends to be less adherent to boiler surfaces than simple tricalcium phosphate, which is... 

Expression levels of the mutant thrombin receptors were determined in transiently transfected COS cells by assaying the level of surface expressed thrombin receptors by FACS analysis, usually for mutant receptors that showed a significant diminution of function. COS cells were transfected by calcium phosphate-DNA co-precipitation30 with 10 ng of DNA. The transfected cells were analyzed by FACS 48 h after transfection. A monoclonal antibody specific for the amino terminal region was used as the primary antibody to detect thrombin receptors present on the surface of the cells.31 A FITC conjugated goat anti-mouse IgG was used as a secondary antibody. Expression levels of the mutant receptors were determined relative to expression levels of wild-type controls. Expression-level data (% of control) for some of the mutant receptors are listed in Table 2 (wild-type thrombin... 

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