Molybdophosphoric acid

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Structural formula
No drawing available
General
Surname Molybdophosphoric acid
other names
  • Phosphomolybdic acid
  • 12-molybdophosphoric acid
  • Trihydrogen phosphododecamolybdate
  • Sunshine reagent
Molecular formula H 3 [PMo 12 O 40 ]
Brief description

orange-yellow, shiny crystals

External identifiers / databases
CAS number
  • 12026-57-2 (anhydrous)
  • 51429-74-4 (hydrate)
PubChem 53384541
Wikidata Q77213
properties
Molar mass 1825.25 g mol −1
Physical state

firmly

density
  • 1.62 g cm −3 (hydrate)
  • 3.15 g cm −3 (20 ° C, anhydrous)
Melting point

78–90 ° C (anhydrous)

solubility

easily soluble in water and ethanol

safety instructions
GHS labeling of hazardous substances
03 - Oxidising 05 - Corrosive

danger

H and P phrases H: 272-314
P: 220-280-305 + 351 + 338-310
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Molybdophosphoric acid is a phosphoric acid - molybdenum compound and belongs to the heteropoly acids .

Extraction and presentation

The compound can be obtained by reacting molybdenum trioxide with phosphoric acid .

properties

Molybdophosphoric acid crystallizes as a yellow hydrate with 28 molecules of water in the crystal lattice H 3 [PMo 12 O 40 ] · 28 H 2 O.

use

It is used as a spray reagent for the detection of antioxidants , alkaloids , uric acid , caffeine , xanthine , proteins , creatinine , ascorbic acid and carotenoids in thin layer chromatography . It is also used for the detection and determination of potassium , thallium , titanium , sulfur dioxide , and for the detection of cesium , cerium , tin , rubidium , antimony , vanadium and palladium . In microscopy it can be used in combination with hematoxylin for nerve staining.

Individual evidence

  1. ↑ a b c d e f Entry on 12-molybdophosphoric acid. In: Römpp Online . Georg Thieme Verlag, accessed on June 16, 2014.
  2. ↑ Data sheet Phosphomolybdic acid hydrate from Sigma-Aldrich , accessed on January 26, 2013 ( PDF ).
  3. ↑ a b c d Entry on molybdophosphoric acid in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
  4. ↑ a b R.F. Sebenik, AR Burkin, RR Dorfler, JM Laferty, G. Leichtfried, H. Meyer-Grünow, PCH Mitchell, MS Vukasovich, DA Church, GG Van Riper, JC Gilliland, SA Thielke: Molybdenum and Molybdenum Compounds , in: Ullmanns Enzyklopädie der Technical chemistry , Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 2005 ( doi : 10.1002 / 14356007.a16_655 ).
  5. ↑ Reinhard Mattisek, Gabriele Steiner, Markus Fischer: Food Analysis . 4th edition. Springer, Berlin 2010, ISBN 978-3-540-92205-6 .