PEEOXYLAMINESULPHONATES AM» II V DROX Y 1. \ M I NETBISULPH« »NATES. ±) 



150° only, for lorn- hours, Li was 22'85 ; and ai 90—100° for five 

 hours and then three hoursal L30, it gave only 22*6 I. In this case, the 

 nitrogen of the hydroxy lamine obtained (as measured by the iodine 

 method) amounted only to 2*5 per cent. In another case, where the 

 hydrolysis was allowed to go on for 48 hours at 90-95° and then 2 

 hours at 130-134°, the nitrogen obtained as hydroxylamine was 2*71 

 per cent. (79*75 per cent, of total nitrogen). 



Inactivity of Sulphites towards Mydroxylaminetrisulphonates. — 

 Potassium hydroxylaminetrisulphonate weighing 2 grams, in 

 sufficient water to keep the salt in solution, was left for 3 days with 

 3 grams of potassium metasulphite, rendered slightly alkaline to 

 lacmoid paper (whilst strongly acid to litmus). The sulphite was 

 then precipitated by barium hydroxide and the filtrate evaporated. 

 In this way 1.98 grams of the hydroxylaminetrisulphonate were 

 crystallised out. The analysis of the salt thus recovered is given as 

 that of II among the analyses of the salt below. 



Analysis of Potassium Hydroxylaminetrisulphonate. — Although this 

 has been analysed by previous workers, it was necessary to make 

 several careful and full analyses in order to establish the fact that 

 it contains more water of crystallisation than the proportion stated by 

 Clans and by Raschig. Four separate preparations were analysed. 



I. 0*4954 g. substance gave 0*3117 g. potassium sulphate; 

 0'5088g. gave 0*8581g. barium sulphate; 0*3387g. gave 0*5<>80g. 

 barium sulphate ; 0*2821g. substance, finely powdered and 

 heated in a current of dried air, first at 95° and then up to 110°, 

 lost 0*0138g\; 0'2174g. lost in this way 0'OlOlg. 



II. 0'2272g. substance gave 0*1429g. potassium sulphate ; 

 1-067 Go-, treated with sodium amalgam for 24 hours and then 

 hydrolysed at 150° for 3 hours, gave 1.7 9 18g. barium sulphate 

 and ammonia=25.59c.c. X/10 acid. 



