IMIDOSULPHONATES. ^3 



Cale. Found. 



(Jacquelain.) 



Barium 47-99 48*26 



Sulphur 16-81 16-81 



* Nitrogen 4-90 4-97 



Hydrogen 0-88 ()-88 



Using junnioiiiated solution of barium chloride in.^tead of baryta water, 

 he got nearly the same results. 



Baritdii potassiimi inudo.sulplionatt'. — This is a, nearly insoluljle, 

 crystalline salt, prepai-able by heating dipotassium hydrogen imidosul- 

 phonate with baryta water. It has been described by Berglund, and 

 was known to Freni}'. We have not analysed it, and Ijelieve it has 

 not been analysed by others. 



Inirliim .soditiin ivtidosidjilwnate. — Barium chloride, in dikite 

 solution, very slowly added with constant stirring to an excess of 

 trisodium imidosulphonate gives a crystalline precipitate, wliicli under 

 the microscope is not seen to contain any tribarium imidosulphonate 

 in admixture. It is alkaline to litmus, very sparingly soluble in 

 water, readily soluble in nitric or hydrochloric acid, and hirgely ])ut 

 never completely decomposed by ammonium carbonate. It contains 

 water, but does not noticeably lose v.eight even jit 120.° Heated 

 quickly to a higher temperature, it is dissipated as a cloud of barium 

 sulphate and gases. Five preparations made at different times show 

 close agreement in composition, with the exception of that first pre- 

 pared (which is entered in our note-book as not pure). The numbers 

 agree with those calculated lor Ba^Na^N, „(803)20, (Ulln),., wliich may 

 be written as 8BaXaX(S03)., OH, + Ba,i\,(SO,),. (OH,), : 



Calc. a h (■ il I' 



Barium 41-12 42-85 40-05 4117 40-45-41-07 40-85-40-91 

 Sodium 5-02 5-08 5-2(i 4-93 — 5-25 



Sulphur 17-46 18-80 — — . 17-54 17-56 



