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Metaphosphoric Acid

Chemical type Metaphosphate HPO3, molecular weight: 80, colorless vitreous humour, deliquescent, density 2.2~2.5G/cm3, soluble in water and produces phosphoric acid (H3PO4). Common is three poly phosphate phosphoric acid (HPO3) 3 and four poly-phosphate (HPO3) 4, whose chemical formula is written simply as HPO3. Metaphosphoric acid is toxic. Used as a chemical reagent, dehydrating agent, catalyst. Phosphate heat dehydration or by the reaction of phosphorus pentoxide with the right amount of cold water. White or light yellow powder, garlic, deliquescent; boiling point 200 c (decomposition); 73.6 melting point ℃; easily soluble in water, ethanol; relative density (water-=1) 1.65; stability: stability of hazard markers: 20 (acid corrosive substances);
Structure type Metaphosphate
Structure type Metaphosphate
Main uses: as a raw material for manufacturing plastic stabilizers, also used in the manufacture of synthetic and phosphite.
In order to prevent pollution of the respiratory tract, must go to acidic water of phosphorus pentoxide. Property P2O5+H2O ═ ═ prepared cold ═ ═ 2HPO3
Metaphosphoric acid's chemical formula is often written in simple HPO3, but in fact no such molecules, real is poly-phosphoric acid, commonly had three four-phosphate and phosphoric acid.
Is generally rigid, transparent glass-like material, easily soluble in water, quickly transformed into phosphoric acid H3PO4, so acid there is no way to be sure. But theoretically metaphosphoric acid are strong acids.
Salt, potassium and sodium salts are soluble, poly-phosphate ion with Ca2+ and Mg2+ ions to form complexes are soluble, but Ag+ salt white