Pyrophosphoric acid, also known under the name diphosphoric acid, is a syrupy liquid or a needle-like crystaline solid. Pyrophosphoric acid is colorless, odorless, hygroscopic and is soluble in water, diethyl ether, and ethyl alcohol. It is the anhydride of phosphoric acid and is produced from phosphoric acid by dehydration. Pyrophosphoric acid is a medium strong inorganicacid. The anion, the salts, and the esters of pyrophosphoric acid are called pyrophosphates. Pyrophosphoric acid slowly hydrolyzes in the presence of water into phosphoric acid. IUPAC nomenclature is a systematic way of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC). ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... The molecular mass of a substance (less accurately called molecular weight and abbreviated as MW) is the mass of one molecule of that substance, relative to the unified atomic mass unit u (equal to 1/12 the mass of one atom of carbon-12). ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change state from a liquid to a gas throughout the bulk of the liquid. ... Density (symbol: Ï - Greek: rho) is a measure of mass per unit of volume. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII alpha-numeric strings. ... Image File history File links Download high resolution version (1797x925, 5 KB) Description: Chemical structure of Pyrophosphoric acid. ... A hygroscopic or hydroscopic substance is a substance that absorbs water readily from its surroundings. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... Diethyl ether, also known as ether and ethoxyethane, is a clear, colorless, and highly flammable liquid with a low boiling point and a typical smell. ... Ethyl alcohol, also known as ethanol or grain alcohol, is a flammable, colorless chemical compound, one of the alcohols that is most often found in alcoholic beverages. ... In chemistry, an anhydride is typically an oxide of a nonmetallic element or an organic radical, capable of forming an acid by uniting with the elements of water. ... Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a weak mineral acid with the chemical formula H3PO4. ... Dehydration is the removal of water (hydor in ancient Greek) from an object. ... Inorganic chemistry is the branch of chemistry concerned with the properties and reactions of inorganic compounds. ... In databases, ACID stands for Atomicity, Consistency, Isolation, and Durability. ... An anion is an ion with negative charge. ... In chemistry, salt is a term used for ionic compounds composed of positively charged cations and negatively charged anions, so that the product is neutral and without a net charge. ... In organic chemistry and biochemistry esters are substances where an organic group replaces a hydrogen atom (or more than one) in an oxygen acid. ... In chemistry, pyrophosphate, or PPi is an anion observed in living systems, usually formed by the hydrolysis of ATP into AMP. The hydrolysis is called pyrophosphorolysis. ... Hydrolysis is a chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water. ...
Sodium pyrophosphate, also called tetrasodium pyrophosphate or tetrasodium phosphate, is a slightly toxic and mildly irritating colorless transparent crystalline chemical compound with the formula Na4P2O7 and CAS number 7722-88-5. ... Categories: Stub | Rheumatology ... Dimethylallyl pyrophosphate (or -diphosphate) (DMAPP) is an intermediate product of both Mevalonic acid (MVA) pathway and DOXP/MEP pathway. ... Adenosine triphosphate (ATP) Adenosine triphosphate (ATP) is the nucleotide known in biochemistry as the molecular currency of intracellular energy transfer; that is, ATP is able to store and transport chemical energy within cells. ...
Orthophosphoric acid, H3P04, a tribasic acid, is obtained by boiling a solution of the pentoxide in water; by oxidizing, red phosphorus with nitric acid, or yellow phosphorus under the surface of water by bromine or iodine; and also by decomposing a mineral phosphate with sulphuric acid.
Pyrophosphoricacid, 'H' 4 P 2 0 7, is a tetrabasic acid which may be regarded as derived by eliminating a molecule of water between two molecules of ordinary phosphoric acid; its constitution may therefore be written (HO) 2 0P O PO(OH) 2.
Metaphosphoric acid, HP0 3, is a monobasic acid which may be regarded as derived from orthophosphoric acid by the abstraction of one molecule of water, thus H 3 PO 4 - H 2 O = HP0 3; its constitution is therefore (HO)P0 2.
A powder according to claim 1, wherein the organic phosphoric acid compound is an acid phosphate, an alkyl-, alkenyl- or aryl-ester of pyrophosphoric or polyphosphoric acid, a phosphonic acid or an ester thereof, or a mixture thereof.
A powder according to claim 4, wherein the acid phosphate is methyl acid phosphate, ethyl acid phosphate, butyl acid phosphate, 2-ethylhexyl acid phosphate, lauryl acid phosphate, palmityl acid phosphate, stearyl acid phosphate, oleyl acid phosphate, phenyl acid phosphate or nonylphenyl acid phosphate.
The organic phosphoric acid compound in the form of alkali metal salt should not be used because such a phosphoric acid metal salt is not dissolved in a solvent used for the treatment and the metal part may remain in the resultant aluminium nitride powder.
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