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Topic: Phosphoric acid

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Mineral acid

Acid

Propionic acid

Pyrophosphoric acid

Weak acid

Hydrochloric acid

Sulfuric acid

Nitric acid

Citric acid

Gastric acid

Sulphuric acid

Pyruvic acid

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	Phosphoric acid - Wikipedia, the free encyclopedia
		Phosphoric acid may be used by direct application to rusted iron or steel tools or surfaces to convert iron(III) oxide (rust) to a water soluble phosphate compound.
		Phosphoric acid is used in dentistry and orthodontics as an etching solution, to clean and roughen the surfaces of teeth where dental appliances or fillings will be placed.
		Phosphoric acid is used as a flux by hobbyists (such as model railroaders) as an aid to soldering.
	en.wikipedia.org /wiki/Phosphoric_acid (1665 words)

	Phosphoric Acid - MSN Encarta
		Phosphoric acid is made by treating calcium phosphate rock with sulfuric acid, followed by filtration of the resultant liquid to remove calcium sulfate.
		The acid is useful in the laboratory because of its resistance to oxidation, to reduction, and to evaporation.
		Among the many uses of phosphoric acid are as an ingredient in soft drinks and dental cements, as a catalyst, in rustproofing metals, and in making phosphates, which are used in water softeners, fertilizers, and detergents.
	encarta.msn.com /encyclopedia_761558451/Phosphoric_Acid.html (409 words)

	Chemical of the Week -- Phosphoric Acid
		Pure anhydrous phosphoric acid is a white solid that melts at 42.35°C to form a viscous liquid.
		Phosphoric acid is not a particularly strong acid as indicated by its first dissociation constant.
		Phosphoric acid is used primarily in the manufacture of fertilizers, detergents, and pharmaceuticals.
	scifun.chem.wisc.edu /CHEMWEEK/H3PO4/H3PO4.html (715 words)

	Highbeam Encyclopedia - Search Results for phosphoric acid (Site not responding. Last check: 2007-10-22)
		Because phosphoric acid is tribasic (having three replaceable hydrogen atoms), it forms monophosphate, diphosphate, and triphosphate salts in which one, two, or three of the hydrogens of the acid are replaced, respectively.
		It was isolated from the nucleic acid of calf thymus tissue in 1894.
		Critical issues in material selection for phosphoric acid plants: corrosion in phosphoric acid plants is a growing hazard as rock grades decline and impurity levels rise.
	www.encyclopedia.com /printablenew/36722.html (817 words)

	DOE - Fossil Energy: Phosphoric Acid Fuel Cells
		Phosphoric acid fuel cells were the first fuel cells to cross the commercial threshold in the electric power industry.
		Phosphoric acid fuel cells operate at around 150 to 200 degrees C (about 300 to 400 degrees F), above the boiling point of water.
		In a phosphoric acid fuel cell, hydrogen must be extracted from fuels such as natural gas outside the fuel cell (a process called "external reforming").
	www.fossil.energy.gov /programs/powersystems/fuelcells/fuelscells_phosacid.html (359 words)

	PHOSPHORIC ACID
		Phosphoric acid is not irritating to the eyes or respiratory tract, unless it is introduced into the atmosphere as a spray or mist, because phosphoric acid has a low vapor pressure at room temperature.
		Phosphoric acid particles are assumed to grow in a stepwise fashion to 99% relative humidity within conducting airways of the lung, having initially reached equilibrium at 90% relative humidity (T= 37 degrees) in the trachea.
		Residues of phosphoric acid are exempted from the requirement of a tolerance when used as a buffer in accordance with good agricultural practices as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest.
	www.frankmckinnon.com /phosphoric_acid.htm (8589 words)

	EPA: Federal Register: Phosphoric Acid; Community Right-to-Know Toxic Chemical Release Reporting
		Phosphoric acid, as well as other phosphates have the potential to cause increased algal growth leading to eutrophication in the aquatic environment (Ref. 3).
		Although phosphoric acid can reasonably be anticipated to cause significant adverse effects on the environment, the United States District Court for the District of Columbia reversed EPA's denial of the petition based upon the Court's assessment that these effects are not caused by phosphoric acid's toxicity, but by its nutrient value.
		Section 372.65 is amended by removing the entry for phosphoric acid under the table in paragraph (a) and removing the entire CAS number entry for 7664-38-2 under the table in paragraph (b).
	www.epa.gov /fedrgstr/EPA-TOX/1999/December/Day-07/t31668.htm (2960 words)

	Phosphoric Acid
		Phosphoric acid is harmful to aquatic life due to its acidity.
		Phosphoric acid is corrosive to the eyes and skin, irritating for the respiratory tract.
		Phosphoric acid is harmful to aquatic life even in low concentration due to its acidity.
	www.efma.org /publications/guidance/section16.asp (736 words)

	Collecting the History of Phosphoric Acid Fuel Cells
		Phosphoric acid fuel cells (PAFC) operate at temperatures around 150 to 200 C (about 300 to 400 degrees F).
		But phosphoric acid, a poor conductor of electricity, was not as attractive, and PAFCs were slower to develop than other types of fuel cells.
		In 1961, G. Elmore and H. Tanner revealed new promise in phosphoric acid electrolytes in their paper "Intermediate Temperature Fuel Cells." They described their experiments using an electrolyte that was 35 percent phosphoric acid and 65 percent silica powder pasted into a Teflon gasket.
	americanhistory.si.edu /fuelcells/phos/pafcmain.htm (1007 words)

	Waterose Paper: Industrial Production of Phosphoric Acid
		In the thermal process, an electric furnace is used to smelt the phosphorous ore using coke and silica.
		The elemental phosphorous enters the top of the combustion chamber where it is atomised by compressed air or steam and burned.
		Sulphuric acid is used to digest phosphate rock (calcium phosphate) producing a calcium sulphate slurry and phosphoric acid, which is separated using filtration.
	www.geocities.com /Waterose_Test/phosphor.html (903 words)

	Exp 15: Potentiometric Titration of Phosphoric Acid
		Solutions of pure phosphoric acid and of phosphoric acid mixed with its conjugate base, dihydrogen phosphate, will be titrated with a strong base.
		The data from the titration of the pure phosphoric acid will be used to determine the concentration of the acid.
		for phosphoric acid is so small that the last proton of phosphoric acid is extremely difficult to remove, and the reaction of phosphoric acid that is analogous to Reaction (8) essentially will not occur in aqueous solution.
	www.chem.vt.edu /RVGS/ACT/lab/Experiments/Exp_15-Phosphoric_Acid.html (1486 words)

	Phosphoric Acid - Search Results - MSN Encarta
		Morocco’s leading exports are phosphates and phosphoric acid.
		- transparent solid used as fertilizer: a water-soluble transparent solid acid.
		- acid formed from phosphorus pentoxide: an acid of a group formed by the combination of phosphorus pentoxide with water, each acid having one more oxygen atom than the corresponding phosphorous acid
	uk.encarta.msn.com /Phosphoric_Acid.html (147 words)

	General Chemistry Online: FAQ: Chemistry of everyday life: Why is phosphoric acid in soda pop?
		Phosphoric acid is deliberately added to soft drinks to give them a sharper flavor.
		The phosphoric acid is corrosive, but actually the acid concentration in soda pop is lower than that in orange juice or lemonade.
		Fumaric acid is used in noncarbonated soft drinks, and tartaric acid gives grape-flavored candies a subtle sour flavor.
	antoine.frostburg.edu /chem/senese/101/consumer/faq/why-phosphoric-acid-in-soda-pop.shtml (314 words)

	Phosphoric acid---Technical grade, food grade 85%,80%,75% min.
		Phosphoric acid is used in metal finishing(rust moving), phosphates production, beverages, food.
		The phosphoric acid we produce is transparent liquid, made from Element Phosphorus by thermal process, not purified wet phosphoric acid (PWA)
		Phosphatizing compounds for rustproofing and improvement of paint bonding of steel; as the major ingredient in solutions used for the chemical and electro-chemical polishing of aluminum, stainless steel, and copper alloys; and in metal cleaning and pickling.
	coasty.com /phosphate/phosphoricacid.html (131 words)

	Agrium - Phosphoric Acid
		Phosphoric acid is a high analysis liquid phosphorus source.
		Phosphoric acid is sold in two primary grades:
		Phosphoric acid is produced at our Conda and Redwater Phosphate Operations.
	www.agrium.com /products_services/ingredients_for_growth/phosphate/phosphoric_acid.jsp (49 words)

	Density Measurement - Phosphoric Acid Measurement
		The phosphoric acid application software is designed to use the temperature and density information that comes from the CL10 HY cell to calculate product baumé, density at a reference temperature, specific gravity and percent concentration.
		Automation Products Inc. uses the same reference tables that are used by phosphoric acid manufacturers to cross check results generated by our phosphoric acid software.
		The CL10 HY and Series 2000 combination have been used to measure phosphoric acid for chemical applications and low concentration acid mixing.
	www.dynatrolusa.com /applications/phosphoric-acid.html (151 words)

	phosphoric acid - Hutchinson encyclopedia article about phosphoric acid (Site not responding. Last check: 2007-10-22)
		) is also known as orthophosphoric acid, and is produced by the action of phosphorus pentoxide (P
		It is used in rust removers and for rust-proofing iron and steel.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /phosphoric+acid (98 words)

	Phosphoric Acid Encyclopedia Article @ Alky.com (Site not responding. Last check: 2007-10-22)
		This page contains quite a lot of relevant information about Phosphoric acid.
		The company in JV with Tunisia-based Group Chimique Tunisien and GSFC will manufacture phosphoric acid in Tunisia.
		Thermal phosphoric acid: This very pure phosphoric acid is obtained by burning elemental phosphorus to produce phosphorus pentoxide and disolving the product in dilute phosphoric acid.
	alky.com /encyclopedia/Phosphoric_acid (1716 words)

	Phosphoric Acid
		Phosphoric acid is used in the manufacturing of phosphates; such as salts, soaps and detergents; fertilizers; yeast; fire control agents; opal glass; electric lights; dental cements; waxes and polishes; gelatins, ethybenzene, propylene, and cumene; and soft drinks.
		Phosphoric acid is incompatible with strong caustics and most metals.
		The acid is very corrosive to ferrous metal and alloys.
	www.vital-visions.net /school/projects/phos-acid.htm (478 words)

	Phosphoric Acid (Site not responding. Last check: 2007-10-22)
		Although it is more commonly known for its use in the production of agricultural fertilizers, phosphoric acid is used in some everyday foods and beverages.
		Used as a flavoring agent, phosphoric acid is found in some cheeses, jams and jellies, and beer, but it is widely used in carbonated drinks, such as Coca-Cola and Pepsi.
		The phosphoric acid content of Coca-Cola has been determined to be about 106.0 mg/L and in Pepsi about 106.9 mg/L. The addition of phosphoric acid lowers the pH of carbonated drinks making them more acidic.
	www.cas.astate.edu /draganjac/page.html (127 words)

	COLA PHOSPHORIC ACID (Site not responding. Last check: 2007-10-22)
		Phosphoric acid, used in many soft drinks (primarily so in test drinks, such as the U.S. market dominating Coca Cola and Pepsi Cola), has become suspect in the increase of the bone deficiency disease...
		For this reason, phosphoric acid is used widely in test as a tart flavoring agent.
		Phosphoric acid is declared on the label as acidulant E 338.
	www.skiboarder.de /28416 (360 words)

	Phosphoric Acid - Products for Phosphoric Acid - Manufacturers,Exporters,Suppliers,Traders,Companies,Factories (Site not responding. Last check: 2007-10-22)
		The phosphoric acid has two grades, one is technical grade, and t
		We have been a big manufaturer of phosphoric acid for many years.
		Phosphoric acid 85% tech grade Specification: Apha 30max Co
	www.alibaba.com /productsearch/Phosphoric_Acid.html (440 words)

	PHOSPHORIC ACID
		If water is used, use in abundance to control heat and acid build-up.
		When diluting, the acid should always be added slowly to water and in small amounts.
		phosphoric acid forms flammable gases with sulfides, mercaptans, cyanides and aldehydes.
	www.jtbaker.com /msds/englishhtml/P3973.htm (1184 words)

	Chemical Sampling Information: Phosphoric Acid
		Synonyms: White phosphoric acid; Orthophosphoric acid; 85% Phosphoric acid; Metaphosphoric acid
		Phosphoric and sulfuric acid may be submitted on the same filter; otherwise, submit as a separate filter.
		Sampling and analysis for this method are for combinations that include gaseous acids (Nitric, Hydrochloric, Hydrobromic) with Phosphoric and Sulfuric Acid mists.
	www.osha.gov /dts/chemicalsampling/data/CH_262500.html (424 words)

	China Phosphoric Acid Products, Catalog, Samples - Alibaba Search for Phosphoric Acid products
		This product is used as a scale and corrosion retarding agent for water-cooling circulation and water boilers, and as a chelating agent and dye-fixing agent for the dyeing, printing and textile industries, and in complexant agent electro-plating.
		Brass and phosphor bronze wire mesh and wire cloth are frequently used in sieving diversified pellets, powders, porcelain clay and glass.
		This product can degrade phytic acid into inositol or phosphoinositide and phosphoric acid, eliminate the simple stomach animal's anti-nutrient action due to non-decompose of phytic acid so as to improve the utility of nutrition.
	chinasuppliers.alibaba.com /search/china_products/Phosphoric_Acid.html (715 words)

	Phosphoric acid (Site not responding. Last check: 2007-10-22)
		Phosphoric acid is produced by burning oxidizing elemental phosphorus with air.
		Phosphoric acid is a clear, colourless, viscous liquid which is miscible with water in any ratio.
		You need Acrobat Reader version 4 or higher to view the file.
	www.thermphos.com /pages/acid.htm (104 words)

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