20 ART. 15— TAMEMASA HAGA. 



The other reason against the belief that the valency of the 

 nitrogen changes when a hydroxylaminedisulphonate is oxidised to a 

 peroxylaminesulphonate is that of the production of the two 

 compounds of trivalent nitrogen, the hydroxylaminedisulphonate 

 and hydroxylaminetrisulphonate by the union of a peroxyl- 

 aminesulphonate with a normal sulphite (p. 13). These two reasons 

 for regarding the nitrogen of a peroxylaminesulphonate as 

 trivalent seem to be conclusive and therefore support the view 

 that these salts are constituted as peroxides or peroximides. 



Since the sodium salt is even more unstable than the potassium 

 salt, the determination of the molecular weight of a peroxylamine- 

 sulphonate has not been possible. It would seem better to modify 

 Hantzsch and Semple's suggestion concerning the molecular weights 

 of the two forms of the potassium salt (p. 3), to the extent of giving 

 the simple formula, (S0 3 K) 4 N 2 0o, to the violet form, and reserving 

 the double formula, or even a higher multiple of this, for the yellow 

 form. 



Products of Decomposition — Without further experiments than 

 those described on pages 23 and -11, the number of the products and 

 the great variations in their proportions are such that the nature 

 of the spontaneous decomposition of a peroxylaminesulphonate cannot 

 yet be fully determined. But its general character can be indicated, now 

 that the constitution of both peroxylaminesulphonates and hydroxyl- 

 aminetrisulphonates has been determined. 



It can hardly be doubted that the molecule of peroxylaminesul- 

 phonate becomes halved by hydrolysis and converted into the 

 hydroxylaminedisulphonate, always found in abundance, and the 

 hijdropcroxijlaminedisulphonate, as yet undiscovered because incapable of 

 continued existence, thus : 



(S0 3 K) 2 NO-ON(S0 3 K) 2 +H 2 0=(S0 3 K) 3 NO-OH+H-ON(S03K) 2 . 



