I. Remsen on Parasulphobenzoic Acid. 361 
Barium parasulphaminbenzoate, (C7H*SO*)?Ba+H?0. This 
salt is prepared by boiling the acid with barium carbonate. It 
1s easily soluble in cold and hot water, and crystallizes in nod- 
ular aggregations. 
The analysis gave the following results: 
0-497 grams salt, dried over sulphuric acid, lost, at 200°, 0°0161 
aoe H?0; and gave 0°2094 grams BaSO4=0°12313 grams 
a. 
Calculated. Found. 
(C"?H*SO‘N) 400 72-08 
Ba 137 24°68 24°77 
H20 18 3°24 3°24 
555 100°00 
The corresponding salt of sulphobenzamic acid crystallizes 
with 4H?O as “a soft, wavellitic, crystalline mass;” it gives o 
its water at 110°. 
SO?NH? 
Ammonium parasulphaminbenzoate, C°H* \G0.ONH*, pre- 
pared by dissolving the acid in ammonia, is easily soluble in 
cold and hot water. It easily forms supersaturated solutions, 
which congeal on being disturbed. It crystallizes in beautiful 
needles or long lamine. j 
he ammonium salt of sulphobenzamie acid crystallizes in 
lamine. 
soluble, colorless, crystalline product was obtained. Fuming 
sulphuric acid also dissolves it with the aid of heat, and as water 
recipitate with the solution, it is probable that a 
anhydride (Limpricht and Uslar). The study of these reactions 
[shall take upin due time. Parasulphaminbenzoic acid ni 
@ symmetrical structure, the investigation of its sulpho-aci 
offers a possibility of throwing light upon the constitution of 
the tribasic acids of benzene; the conversion of the two sulpho. 
