tert.-butylhydroperoxide; acetic acid; sodium sulfate in neat (no solvent) byproducts: (CH3)3COH, H2O; kept for 20 h at 20°C in a sealed ampule; liq. phase removed (vac.), residue recrystd. (benzene/hexane);

in o-xylene byproducts: methyl acetate; thermal decomposition (160°C, 40 h); gas chromy.;