2\2 E. DIVERS AND T. HAGA 



nitrilo—, imido-, and amido-, oximido- and oxyamidosulphonate, and 

 the other set — amine- and hydroxyamine-tri-, di-, and monosidphonate, 

 there is not much to choose by. But as it is desirable on the score 

 of consistency, to employ exclusively one set or the other, the already 

 prevalent use of nitrilo-, imido-, and amidosulphonate makes it proper 

 to use oximido- and oxyamidosulphonate rather than lujdroxijamine-di- 

 and monosidphonate. 



Oxijamidosulplionie acid, known only in solution, was first pre- 

 pared by Fremy, who found that potassium oximidosidphonate, (neutral- 

 sulphazotatej, sooner or later decomposed into acid-sulphate and the 

 oxyamido-salt, doing so at once when its solution was boiled. 

 Altering his atomic weights to those now accepted, and writing em- 

 pirically his formula" 1 , to which he attached no constitutional signifi- 

 cance, his equation becomes — 



S 5 Q S0 K 4 HÄ= S 2 8 K 2 H 6 N 2 +2KHS0*+H 2 S0 4 * 

 Clans has shown, however, that these formulas incorrectly represent 

 the composition of the salts, and Haschig has confirmed Claus's state- 

 ment. The two formulas corrected and halved stand as So0 9 lv 2 H 5 K 

 and SOJvH.X, or H( )X(S( ),lv),(OIIÔ) 2 and HONH(S0 3 K), accord- 

 ing to Clans. The latter formula we have further to modify 

 slightly. 



To get the oxyamidosulphonic acid pure for preparing its salts, 

 Fremy neutralised with ammonia the hvdrolysed solution of potassium 

 oximidosulphonnte. added barium chloride, filtered oil' sulphate, and 

 then, by adding baryta- water, precipitated a dibarium oxyamidosulpho- 

 nate. This salt, when washed, he decomposed by adding just enough 

 sulphuric acid fo combine with the barium, and then used the filtered 

 solution of the new acid for combining with bases. The acid appears 



He recognised the peculiarity and importance of this first instance of what we now style 

 the hydrolysis of a suiphonate into a sulphate. 



