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Eaton's reagent

Names
Other names Phosphorus pentoxide-methanesulfonic acid
Identifiers
CAS Number	39394-84-8
ECHA InfoCard	100.204.349
EC Number	679-375-3
CompTox Dashboard (EPA)	DTXSID30583215
Properties
Solubility in water	hydrolyzes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Eaton's reagent (10 wt% phosphorus pentoxide solution in methanesulfonic acid) is used as an alternative to polyphosphoric acid in chemical synthesis to promote acylation reactions.

References

1. Eaton, P. E.; Carlson, G. R.; Lee, J. T. (1973). "Phosphorus pentoxide-methanesulfonic acid. Convenient alternative to polyphosphoric acid". J. Org. Chem. 38 (23): 4071. doi:10.1021/jo00987a028.

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