186 M. Gericke on Sulphobenzole. 



equivalent of H is replaced by sulpliophenyle and the other by 

 pheuyle ; and if so, it ought to split up by the action of potash 

 into sulphophenylate of potash and benzole, 



Cu H^ S2 O^ j ^ ^Q jjQ ^ C'2 H^ S^ 0^ KO + C^2 H« ; 



but it undergoes not the shghtest change on being heated with 

 concentrated potash. But by the action of sulphuric acid it la 

 converted into sulphophenylic acid, 



QU JJIO §2 04+ S2 H^ 0^ = 2(012 H6 §2 06). 



Sulphobenzole. Sulpliopheuylic acid. 



TMien sulphobenzole is heated some time with fuming nitric 

 acid, water precipitates from the solution a yellow product, which 

 by treatment with hot alcohol furnishes nitro- and binitro- 

 sulphobenzole. 



Nitrosulphobenzole, ^la^l^^^"^ ^^' j>, is readily soluble in 



hot alcohol, from which it separates on cooling as a heavy, yel- 

 low, soft mass. It can be obtained in small indistinct crystals. 

 By the action of sulphide of ammonium it is converted into an 



., ,, ^ , C12 H^ (NH2) son ... .. „ 



amidosulphobenzole, qi2 jjs goa Y, which consists ot 



microscopic rectangular prisms soluble in hot water and alcohol. 

 This forms with hydrochloric acid a compound, 



Ci2H4(NH2)S0n „p, 



C12H5 SO*/ ^* 



crystallizing in large rectangular prisms, which unites with 

 bichloride of platinum to form a compound, 



Ci2H4(NH2)SOn „.,, p,p,a 



Q12 JJ5 gO^ r'^^h ri-'-'l . 



7,1. 7 Ci« H4 (N04) son .,,,,. J, 

 Bmttrosulphobenzole, qi2xj4 mo^) SO* I ' ^^ obtained by 



acting on sulphobenzole with a mixture of sulphuric and nitric 

 acids. Recrystallized from alcohol, it presents the form of silky, 

 microscopic, rhombic plates, which melt at 164°, and subhme 

 unchanged at 320°. By the action of sulphide of ammonium 



Ci2H4(NH2)S0^1 

 this is converted into binamidosulphobenzole, ci^H^fNH^^SO* I ' 



a base crystallizing from alcohol in small rectangular prisms. 

 With hydrochloric acid it forms a crystalhne compound, 



Ci2H4(NH2)SOn „„pi 

 Ci2H''(NH2)S02/'*^^'' 



with which bichloride of platinum unites to form a compound, 



