1878.] T07 " (Smith. 
Analysis of the yellow colored salt. 
Water Determination.—.1617 grms. air dried salt lost upon heating at 
140° for four hours .0168 grms. H,O = 10.39%. 14 mols H,O require 
9.53%. 
Potassium Determination.—.1449 grms. substance gave, upon evapora- 
tion with sulphuric acid, .0480 grms. K,SO, = 14.86% potassium. From 
this we see that this salt is also a derivative of a monochlordinitrophenol. 
The formula is C, H, Cl(NO,), OK + 13 H,0. 
This salt is much more soluble than the red compound. The color of 
the latter is so intense as to entirely obscure the yellow, which conse- 
quently is overlooked unless great care is exercised in re-crystallizing the 
red compound. 
MONOCHLORDINITROPHENOL. 
Fusing point 79°-80°C, 
Upon mixing a cold solution of the yellow salt with dilute nitric acid the 
corresponding phenol separated in yellowish colored masses, which upon 
being washed and re-crystallized several times from aqueous solutions, 
separated in rather long lemon-yellow colored needles. The fusing point 
of this compound remained constant at 79°-80°C. The point of solidifica- 
tion was 25°C., considerably lower than that of the acid corresponding to 
the red needles. In cold water the acid is rather insoluble, readily dis- 
‘ solved on heating. 
Another difference noticed between the free acid from the red silky 
needles, and that just above described is in the silver salts. The former 
yields a soluble salt crystallizing in long bright red colored needles, the 
latter one separates out in bronze colored needles which possess a marked 
metallic lustre. 
This new Chlordinitrophenol is usually formed in very small quantities, 
therefore I have not beenable to subject it to as thorough an investigation as 
I desired. The material with which I worked was, however, perfectly 
pure, and as I have obtained the compound at various times, and the 
analytical results being the same on all occasions, I do not hesitate to 
announce the above acid as another of the many possible compounds hav- 
ing this composition. In regard to the position of the (NO,) groups I can- 
not as yet give any definite information. 
a- MONOCHLORDINITROPHENOL-ANILINE. 
A small quantity of a-Chlordinitrophenol was mixed with suflicient 
aniline to dissolve the former in the cold. As soon as the two compounds 
were brought in contact the solution assumed a beautiful red color, which 
imparts to the skin a rather difficultly removable yellow stain. The solu- 
tion was gently warmed on a water bath for ten minutes, and the liquid 
then poured from the flask containing it into a rather large watch glass and 
allowed to cool. Upon cooling there separated hard nodular crystals, 
which were pressed well between paper and dried by exposure to the air, 
