Molybdophosphoric acid
Structural formula | ||||||||||
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General | ||||||||||
Surname | Molybdophosphoric acid | |||||||||
other names |
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Molecular formula | H 3 [PMo 12 O 40 ] | |||||||||
Brief description |
orange-yellow, shiny crystals |
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properties | ||||||||||
Molar mass | 1825.25 g mol −1 | |||||||||
Physical state |
firmly |
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density |
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Melting point |
78–90 ° C (anhydrous) |
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solubility |
easily soluble in water and ethanol |
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safety instructions | ||||||||||
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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
- ↑ a b c d e f Entry on 12-molybdophosphoric acid. In: Römpp Online . Georg Thieme Verlag, accessed on June 16, 2014.
- ↑ Data sheet Phosphomolybdic acid hydrate from Sigma-Aldrich , accessed on January 26, 2013 ( PDF ).
- ↑ a b c d Entry on molybdophosphoric acid in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
- ↑ 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 ).
- ↑ Reinhard Mattisek, Gabriele Steiner, Markus Fischer: Food Analysis . 4th edition. Springer, Berlin 2010, ISBN 978-3-540-92205-6 .