1922.] Indian Science Congress. L.8.C. 69 
prepared by the condensation of nitroso dimethy] aniline and m phenylene 
diamine disulphide, is a sulphide dye giving reddish brown shades which 
are however very sensitive to acids and alkalis, 
Dimethyl amino hydroxy sulphydroxy phenazine 
N 
WY SH 
N(CH,) OH 
a nf7 
prepared from the above by diazotising and boiling with water is a 
sulphide dye. The shades are similar but duller than those of the above 
dyestuff and are also sensitive to acids and alkalis. 
Dimethyl aminoe sulphydroxy naphtho phenoxazime 

CH)N 
CR, 
Ci(?) SH 
prepared by the condensation of nitrosodimethylaniline and 
‘disulphide, is dark blue and insol. in sodium sulphide. 
B naphthol 
Dimethylamino-sulphydroxy phenoxazone 
aN SH | 
(CH N 
3) Ys 
bos) 
prepared by the condensation of nitrosodimethylaniline and thioresorem 
is dark blue and insoluble in sodium sulphide. 
0 
NO QOH 
HS SH 
co 
prepared by the condensation of phthalic anhy: 
soluble both in caustic soda and sodium sulphide 
cotton from a sulphide vat. 
Thio fluoreacein 
dride and thioresorcin is 
but is not absorbed by 
