3 ^'f> 
hours, diluted, and 75 c.c. of commercial hydrogen peroxide added. At 
the end of two days the precipitate is boiled for two hours and 
filtered. On acidifying with diluted sulphuric acid; the f. amino- 
phenyl-stibinic acid is then obtained, which crystallizes in small 
needles from alcohol and water (i tj) and readily forms a sodium salt 
The latter does not melt under 360® C., but turns brown at 323° C- 
326® C. When treated with potassium iodide and sulphuric acid it is 
easily converted into p. iodo-aniline (M.P. 61° C). 
Below is an analysis of the sodium salt. 
(C,H, 0 ,NSbNa) 
CalcuIalecJ Found 
c 
H 
XT 
25*26 
280 
per cent. 
24*37 per cent. 
3*04 
N 
4*91 
5*i8 
Sb 
42*11 
4263 
Na 
8*o6 
8*19 
2517 per cent. 
2-92 
504 
4243 
8-27 
Preparation of m. atnino-phcnyl-s/ibinic acid. 
Twelve grammes of aniline are kept boiling, using an air 
condenser, and fifteen grammes of antimony trichloride are added in 
small portions. After all the antimony trichloride is dissolved, the 
temperature is kept up to 165° for three hours, and then the mixture 
poured into 500 c.cm, of water. The further procedure is the same 
as for the preparation of p. amino-phenyl-stibinic acid The acid 
crystallizes from alcohol in long needles and melts at 207® C.-20S® C 
tu potassium iodide and sulphuric acid it forms, 
though very sparingly, w. iodo-aniJine (M.P. 26® C.). 
t is easily acetylated on boiling with acetic anhydride for two 
ours, an yie s small needles which crystallize from diluted alcohol 
(I : 15)- M.P. 186® C- 1 88® C. 
acid ■ - ^ analysis of the sodium salt of w. amino-phenyl-stibinir 
C 
H 
N 
Sb 
Na 
^-’alculated 
25‘26 per cent. 
2 80 
4-91 ” 
42 ‘ri 
8 ’o6 
(CgH^OjNSbNa) 
FoujkI 
(I) 
25 03 per cent. 
3-12 
472 
4276 
8'I4 
(21 
42*26 per cent. 
8*19 
