I, Remsen on Mitroparasulphobenzoie Acid. 119 
of Nordhausen sulphuric acid and fuming nitric acid at the 
boiling temperatures, no matter how long the boiling may be 
continued. It may, further, be looked upon as an interesting 
result that the Nordhausen acid should cause a conversion of 
the NH? group into OH; a fact which at least indicates a 
remarkable predisposition on the part of the amine-acid to con- 
version into the corresponding sulpho-acid. 
Finally, by employing a mixture of the two agents already 
employed, I was enabled to obtain a substitution-product of 
parasulphobenzoic acid. The boiling was continued until red 
fumes ceased to be given off, and the solution became perfectly 
clear. On now diluting with water, neutralizing with baric car- 
bonate, ete., a new salt was obtained. This was comparatively 
easily soluble in hot water, though less so in cold water. It 
crystallized in long, lustrous needles, arranged concentrically in 
1. 02345 grams salt lost 0:0147 grams at 200°; and then gave 
01320 grams BaSO* =0-077616 grams Ba. 
TL. 0:2335 grams salt lost 00155 grams at 200°; and then gave 
01325 grams BaSO‘ =0 0779 grams Ba. 
Calculated. Found. 
CIHISNO?. ..245. 8000. (tee eee 
Ba 137 33°50 33°10 33°37 
MSHI BF i, OOO cer ARF, aig OSE 
409 100°00 
The formula of this salt is thus seen to be 
C*H3(NO?) 160. Ov Ba + 14H20. 
. the nitro-group in either of these acids, nor have we as yet 
ny data that will enable us to draw conclusions of value with 
relerence to this point. In this connection, the following 
a So known. Now, if it be possible to introduce into these 
mto-acids: the sulpho-group, compounds would be obtained 
* Annalen der Chemie u. Pharmacie, evi, 27. 
