HYDROXYLAMINE-a/9-DTSULPHONATES. 1 7 



and hydroxylamine sulphates, except a very little ammoninni 

 sulphate, was obtained. 



In other experiments, using m these cases the dipotassium 

 salt, the hydrolysis was allowed to go on either in the cold or at 

 60°, and portions of the solution occasionally tested to see whether 

 some indication could be got of the production of hydroxy lam ine-«- 

 monosulphonate at any stage of the hydrolysis. In making the 

 test, the acid sulphate was removed by barium chloride and the 

 solution then tested with iodine in presence of sodium acid-carbon- 

 ate. Since the consumption of the iodine caused no precipitation 

 of barium sulphate, evidence was thus obtained that the reducing 

 substance was hydroxylamine only and not its sulphonate 

 derivative. Ultimately, by evaporating the solution, when suf- 

 ficiently hydrolysed, hydroxylamine sulphate was crystallised out, 

 along with the sodium sulphate. 



