polyphosphoric acid

IdentificationSynonyms: Phospholeum; Tetraphosphoric acid; Superphosphoric acid; PPADe: PolyphosphorsäurenES: Ácidos polifosfóricosFr: Acides polyphosphoriquesCAS No.: 8017-16-1 EC No.: 232-417-0Molecular Weight:337.93 (similar)Molecular Formula: H6P4O13 (similar)Density: 2.05M.P.: 550°CFreezing Point.: 16°CPreparation:Polyphosphoric acid is a group of different chain-length polymers of phosphoric acid (H3PO4), including Pyrophosphoric acid (H4P2O7), triphosphoric acid (H5P3O10), tetraphosphoric acid (H6P4O13) and trimetaphosphoric acid (H3P3O9) etc. When two orthophosphoric acid molecules are condensed into one molecule, pyrophosphoric acid (H4P2O7) is obtained as follows:2 H3PO4 → H4P2O7 + H2O. Three orthophosphoric acid molecules can condense in a row to obtain tripolyphosphoric acid (H5P3O10). Industrially, polyphosphoric acid can be obtained by reaction between phosphoric acid (H3PO4) and phosphorus pentoxide. Viscosity of pholyphosphoric acid (PPA) under normal temperature is very high. Steam heating or bathing heating can increase product’s flowabilityApplication1) Polyphosphoric acid is used as cyclizing agent and acylating agent2) Polyphosphoric acid is also used in asphalt industrySpecificationItemsSpecificationContent105% min.115%, 116% min.P2O578% min.84% min.Iron (Fe)0.005% max.0.002% max.Sulfate0.01% max.-Chloride as Cl-0.003% max.Heavy metals as Pb0.005% max.0.003% max.Arsenic0.01% max.0.008% max.Color50 max.40 max.Appearanceclear viscous liquidclear viscous liquidStandard Packaging340kg/drum, 1600kg/1000L IBCRisks and Safety InfoDanger! Acidic corrosive liquidClass 8; UN1805; PG IIIR-Phrase: R 34S-Phrase: S25, 36/37/39, 45For more information, please see MSDS