2 AET. 0. — T. HAGA. 



essential physical and cliemical proj)erties. The one is a ßß- 

 clerivative, the other an a^9-derivative of hydroxy lamine. Which 

 is which is determined by the behaviour of the two salts towards 

 sodium amalgam. A salt of the series already known remains 

 unaffected, whilst one of the new series decomposes (p. 12) into 

 sulphate and aminemonosulphonate (sulphamate, aminosulphate), 

 just as its parent salt, hydroxylaminetrisulphonate, decomposes, 

 in like circumstances, into sulphate and aminedisulphonate 

 (iminosulphate). It must, therefore, have the «,9-coastitution, 

 as shown in the following equation", framed to express its de- 

 composition by sodium : 



(SOsNa). . NH(SO;,Na) 4- H.O + 2Na =(SO,Na) . ONa + NH^lSO.Na) + NaOH. 

 and the other salt have the /9^9-constitution which it has always 

 been assumed to have, HON(S03Nh)2. The activity of the aß- 

 salts towards sodium amalgam serves also to demonstrate their 

 sulphatic constitution (derived from that of the hydroxylamine- 

 trisulphonates) as the mixed anhydrides''' of an acid-sulphate 

 and a hydroxylaminemonosulphonate. 



The action of potassium hydroxide upon the two salts seems 

 clearly to establish the difference there is in their constitution. 

 The old salt reverts to nitrite and sulphite when it is left, even 

 in the cold, in a concentrated solution of the alkali (this Journ. 

 7, 40), whereas the new salt is only incompletely decomposed 

 into sulphate, aminemonosulphonate, and nitrogen (p. 13)., after 

 several hours' digestion at 100-125° with the alkali. These 

 results are exhibited by the following equations, the upper for 

 the old or ^/3-salt and the lower for the new or «/9-salt : 



* Two other examples of such mixed sulphatic anhydrides are any' hydroxylaminetri- 

 sulphonate and any hyponitrososulphate. Ka^chig has recently adduced evidence (Zeit- 

 angew. Chem., ]9(»5, i8, i;509) thit nitrosyl sulphate is, after all, not a sulphate but a 

 nitrosulphonate, OoX.SOgll. 



