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Phosphomolybdic acid solution (CAS 12026-57-2)

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Synonym:Masson Trichrome; Molybdophosphoric acid
Application:Water soluble compound used in chromatography, histology staning and spectrophotometry
CAS Number:12026-57-2
Molecular Weight:1825.25
Molecular Formula:12MoO3•H3PO4
Refer to Certificate of Analysis for lot specific data (including water content).
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Product NameCatalog #UnitPriceQtyAddFavorites
Phosphomolybdic acid solution sc-203346 100 ml $51
Phosphomolybdic acid solution sc-203346A 500 ml $165
This is classified as a Dangerous Good for transport and may be subject to additional shipping charges.
Phosphomolybdic acid solution is primarily used in spectrophotometric determination of phosphate ions. PMA is also component in the 3-color histology stain called Masson’s trichrome; employed in the differentiation step, Phosphomolybdic acid is one of the solutions fixed tissues are immersed in prior to subsequent staining. Phosphomolybdic acid is also used as reagent for simple and rapid colorimetric determination of phenothiazine derivatives. PMA oxidizes the phenothiazine derivative to a cationic free radical, forming a coloured salt. A preliminary extraction is necessary if certain reductants (sulphite or ascorbic acid) are present as stabilizers, as they will reduce the reagent to phosphomolybdenum blue.
Also available as dry reagent: Phosphomolybdic acid hydrate (sc-215711)
Technical Information
Formulation:20 % wt. in ethanol
Physical State:Liquid
Storage:Store at 4° C
Boiling Point:158° C at 760 mmHg
Density:0.94 g/mL
Safety and Reference Information
Transport:UN 2924, Class 3(8), Packing group II
WGK Germany:3
PubChem CID:11251951
Merck Index:13: 7428
MDL Number:MFCD00011341
EC Number:234-713-5
SMILES:OP(=O)(O)O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O. O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)= O.O=[Mo](=O)=O
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

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1. Fujinaga, T., et al. 1971. Talanta. 18: 960-962. PMID: 18960967
2. Stan, M., et al. 1977. Talanta. 24: 140-142. PMID: 18962047
3. Li, Y., et al. 2009. Org. Lett. 11: 2691-2694. PMID: 19514796
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