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Shaken with conc H2SO4 (to remove alcohol added as an oxidation inhibitor), washed with water, then dilute
KOH or aqueous Na2C03 and again with water. After an initial drying with CaC12, MgSO4 or by distn, it is
refluxed with P2O5, Cas04 or CaH2 and fractionally distd. Carbonyl-containing impurities can be removed as
described for chloroform.

It is form Purification of Laborarory Chemicais
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