in toluene byproducts: sodium 4-methylbenzenesulfonate; heated for 2 h at 80-90°C; cooled, filtered, solvent-removed, extd. (petroleum ether);

in water; acetone byproducts: sodium 4-methylbenzenesulfonate; a soln. of NaCl in H2O added to a soln. of Bi compd. in acetone; crystals washed (H2O), dried;