Phosphate Powder

When freshly mixed, the carboxyHc acid groups convert to carboxjiates, which seems to signify chemical adhesion mainly via the calcium of the hydroxyapatite phase of tooth stmcture (32,34—39). The adhesion to dentin is reduced because there is less mineral available in this substrate, but bonding can be enhanced by the use of minerali2ing solutions (35—38). Polycarboxylate cement also adheres to stainless steel and clean alloys based on multivalent metals, but not to dental porcelain, resin-based materials, or gold alloys (28,40). It has been shown that basic calcium phosphate powders, eg, tetracalcium phosphate [1306-01-0], Ca4(P0 20, can be substituted for 2inc oxide to form strong, hydrolytically stable cements from aqueous solution of polyacids (41,42). [Pg.473]

The most widely deployed industrial explosion suppressant is mono-ammonium phosphate powder (MAP). This suppressant has a wide range of effectiveness. However, it can prove to be a contaminant, necessitating stringent clean-down procedures after a suppressed explosion incident. This limitation is overcome by selecting a sodium... [Pg.2328]

The sodium bicarbonate suppressant attains almost equivalence in performance with the monoammonium phosphate powder. Water has proven to be a very effec tive suppressant of dust, especially grain and Fodder dusts. A suppressant is regarded as being veiy effec tive when an increase of the artivatiou pressure of the explosion system leads... [Pg.2329]

Alkaline All-Purpose Industrial Cleaner Phosphated. Powder Type... [Pg.10]

SAFETY PROFILE Experimental poison by subcutaneous route. Moderately toxic to humans by ingestion. Moderately toxic experimentally by ingestion, intraperitoneal, and intravenous routes. An experimental teratogen. Human systemic effects by multiple and unspecified routes toxic psychosis, excitement, respiratory stimulation, nausea or vomiting, and sweating. Experimental reproductive effects. Mutation data reported. A powerful irritant which affects the central nervous system. Incompatible with ferric salts, mineral acids, iodine, lead acetate, silver nitrate, sodium phosphate powder. When heated to decomposition it emits toxic fumes of Na20. [Pg.1268]

In food applications, tribasic calcium phosphate powder is widely used as an anticaking agent. See Section 18. [Pg.100]

Moisture content slightly hygroscopic. A well-defined crystalline hydrate is not formed although surface moisture may be picked up or contained within small pores in the crystal structure. At relative humidities between about 15% and 65%, the equilibrium moisture content at 25°C is about 2.0%. At relative humidities above about 75%, tribasic calcium phosphate may absorb small amounts of moisture. Particle size distribution Tribasic calcium phosphate powder typical particle diameter 5-10 pm 98% of particles <44 pm. [Pg.100]

Tribasic calcium phosphate occurs naturally as the minerals hydroxylapatite, voelicherite, and whitlockite. Commercially, it is prepared by treating phosphate-containing rock with sulfuric acid. Tribasic calcium phosphate powder is then precipitated by the addition of calcium hydroxide. Tribasic calcium phosphate is alternatively prepared by treating calcium hydroxide from limestone with purified phosphoric acid. It may also be obtained from calcined animal bones.Some tribasic calcium phosphate products may be prepared in coarser, directly compressible forms by granulating the powder using roller compaction or spray drying. [Pg.101]

Trisodium Phosphate powder salurslad powder eaioraiotf 28 2B 28 28 fclll ". .v M II K... [Pg.33]

Kieswetter K, et al. Characterization of calcium phosphate powders by ESCA and EDXA. Biomaterials 15(3) 183-188, 1994. [Pg.577]

Ishikawa K, Ducheyne P, Radin S (1993) Determination of the Ca/P ratio in calcium-deficient hydroxylapatite using X-ray diffraction analysis. J Mater Sci Mater in Med 4 165-168 Ishikawa K, Miyamoto Y, Kon M, Nagayama M, Asaoka K (1995) Non-decay type fast-setting calcium phosphate cement composite with sodium alginate. Biomaterials 16 527-532 Itatani K, Iwafune K, Howell FS, Aizawa M (2000) Preparation of various calcium-phosphate powders by ultrasonic spray freeze-drying technique. Mater Res Bull 35 574-85 Ito M, Hidaka Y, Nakajima M, Yagasaki H, Kafrawy AH (1999) Effect of hydroxylapatite content on physical properties and coimective tissue reactions to a chitosan-hydroxylapatite composite membrane. J Biomed Mater Res 45 204-208... [Pg.663]

General Purpose Cleaner (Consumer Low Alkaline. Won-Phosphate Powder)... [Pg.54]

Laundry Break-Industrial Institutional (Phosphate. Powder. High Alkalinity)... [Pg.88]

Laundry Detergent-Industrial Institutional (Reduced Phosphate, Powder ... [Pg.89]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...