Phosphomolybdic acid
Other names	Molybdophosphoric acid; dodecamolybdophosphoric acid
Identifiers
CAS number	12026-57-2 Y, 51429-74-4 (hydrate)
EC number	234-713-5
MeSH	Phosphomolybdic+acid
Properties
Molecular formula	H3PMo12O40
Molar mass	1825.25 g/mol
Hazards
EU Index	Not listed
Flash point	Non-flammable
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Phosphomolybdic acid, also known as dodeca molybdophosphoric acid or PMA is a component of Masson's trichrome stain. It is a yellow-green compound, freely soluble in water and polar organic solvents such as ethanol. It is used as a reagent in thin layer chromatography for staining phenolics, hydrocarbon waxes, alkaloids and steroids.

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