JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY 

 TOKYO, JAPAN. 



VOL. XVII, ARTICLE 1. 



Ammonium and other Imidosulphites. 



By 



E. Divers, and M. Ogawa. 



The fact of the existence of ammonium imidosulphite as a 

 product of the decomposition of the amidosulphite by very gentle 



heating, 



2NH 2 SO,NH 4 -NH 3 +NH(S0 2 NH 4 ) 2 , 



was brought before a meeting of the London Chemical Society 

 last session {Proa. Ghent. Soc. 1900, 16, 113). The present paper 

 consists of a fuller account of this salt and other imidosulphites 

 than could then be given. 



Ammonium amidosulphite, from which the imide salt is 

 derived (this Journal, 1900, 13, 187), is readily formed by the 

 union of sulphur dioxide and ammonia, but is so unstable as to 

 be largely decomposed by the unavoidable heating it suffers ^Yhell 

 these gases come together, unless cooled ether be used as their 

 solvent. On keeping the dry salt at a temperature of about 35°, 

 its decomposition goes on and ammonia escapes for some hours. 



