358 I. Remsen on Parasulphobenzoie Acid. 
high temperature, but to undergo decomposition before this 
point was reached. These properties distinguish the new sub- 
stance from the amide of parasulphotoluenic acid. Its compo- 
sition was determined by the analysis. 
I. 0°8657 grams of the substance, thoroughly dried over sulphuric 
acid, were oxidized in a silver basin with saltpetre and potas- 
sium hydroxide (Liebig’s method). There were obtained 1°03 
grams BaSO#=0-14146 grams 8. 
II. 0°5505 grams of the dried substance were heated with soda 
lime, and the vapors collected in dilute hydrochloric acid. In 
this way were obtained 0°262 grams Pt, corresponding to 
0°037163 N. 
Calculated. Found. 
CtH704 155 7711 
Ss 32 15°92 16°34 
N 14 6°97 6°75 
201 100°00 
These results agree with the formula C*H* ai ae and 
this formula agrees with the method of formation of the sub- 
stance. e have: 
SO?. OH SO?, NH? SO? NH? 
C&H i CH, C*H4 1 CHe, and C&H4 | CO. OH. 
= —— =a Nestea s “a TT 
Sulphotoluenic Acid. Sulphotoluenamide. New Acid. 
I have given the acid the name parasulphaminbenzoic acid, as 
indicating the constitution which it undoubtedly possesses. 
A compound of a similar constitution, but belonging to 
another series, is already known, viz: the so-called _sulphoben- 
zamic acid. This was prepared by Limpricht and Uslar* an 
by Engelhardt.+ The former obtained it by heating sulpho- 
2 
benzamide, C*H*4 a a or ammonium ethylsulphobenzo- 
: : 
* Annalen der Chemie u. Pharmacie, cvi, 27. 
+ Jahresberichte, 1858, S. 278. 
