Identification and Constitution of Fremy's 



Sulphazotised Salts of Potassium, his 



Sulphazate, Sulphazite, etc. 



By 



Edward Divers, M. D., D. ^c, F. R. S., Emeritus Prof., 



and 

 Tamemasa Haga, D. i^c, F. 0. S., 



Professor, Tokyo Imperial University. 



A safficieDtly concentrated solution of potassium nitrite and 

 hydroxide submitted to the action of sulphur dioxide gave 

 Freray minute silky needles of a salt which he provisionally named 

 jjotassium sulphazate. With slightly diminished concentration of 

 the solution he generally obtained instead the brilliant, often 

 hard, rhombic prisms of j^otassmm basic suljohazotate (o/6-normal 

 hydroximidosulphate, this journal, 7, 15). But sometimes 

 there was obtained neither of these salts before the solution 

 became transformed into a starch-like jelly through the form- 

 ation of a salt which he named potassium metasulphazate, or 

 else became filled with spangles of yet another salt called by him 

 potassium metasulphazotate. When the solution was a little too 

 dilute to give any of these and when too much alkali had not 

 been added, there usually appeared peculiarly pointed crystals of 

 the salt he named potassium neutral sul])liazotate (2/3-normaI hydr- 

 oximidosulphate Raschig) and, lastly, with still greater dilution 



