J.Prakt.Chem. 5.1872;367-368
(
http://visualiseur.bnf.fr/Visualiseur?Destination=Gallica&O=NUMM-90768)
If potassium pyrosulfate is heated to boiling with an alcoholic solution of sodium ethoxide for a longer time, quite much of a salt of ethylsulfuric acid is formed (Na or K). Because this salt is insoluble in absolute alcohol one proceeds as follows to identify it. After the long time of cooking, to the boiling liquid water is consecutively added so that the alcohol content sinks to 70-75%, boiling is kept up for some time, and finally the reaction mixture is filtered and evaporated. The remaining salt consists of the Na/K salts of carbonic, ethylsulfuric and traces of sulfuric acid. 96% ethanol ("Weingeist") dissolves mainly the ethylsulfuric acid salt.
Persulfates are OTC, cheap and the perfect precursors to pyrosulfates
Post 519262
(psyloxy: "my last word on persulfate decomposition", Chemistry Discourse).
NaOEt is easy to make from OTC stuff
Post 512239 (missing)
(psyloxy: "some great alkali alkoxide patents", Chemistry Discourse).
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psyloxy--