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Phosphotungstic Acid

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Phosphotungstic Acid AR ACS


Phosphotungstic Acid AR ACS
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Product Details:
Physical StatePowder
Packaging Size5 kg to 200 kg
Grade StandardAnalytical Grade, Reagent Grade
Molecular FormulaH3PO4.12(WO3).H2O
Molecular Weight2898.07
CAS NO12501-23-4

Phosphotungstic Acid Hydrate, Tungstophosphoric acid (TPA), Phosphotungstic acid (PTA, PWA) 12-Phosphotungstic acid, Dodecatungstophosphoric acid


  • the homogeneous catalysis of the hydrolysis of propene to give 2-propanol
  • the homogeneous catalysis of the Prins reaction
  • the heterogeneous catalysis of the dehydration of 2-propanol to propene and methanol to hydrocarbons.


    Phosphotungstic acid has been also used to precipitate different types of dyes as "lakes", like basic dyes and triphenylmethane dyes, e.g. pararosaniline derivatives. Phosphotungstic acid is used in histology for staining specimens, as a component of phosphotungstic acid hematoxylin, PTAH, and “trichrome” reagents, and as a negative stain for imaging by a transmission electron microscope.

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