70 1.8.C. Proceedings of the Ninth [N.S., XVIII, 
Diamido disulphydroxy acridine 
CH 
HS SH 
| 
H,N | NH 
prepared by the reaper of formaldehyde and m phenylene diamine 
disulphide and oxidation of the product with papi arene is soluble in 
sodium sulphide and area light brown shades on cott 
Dinitroso prec e , prepared by the action of nitrous acid on 
thioresorcin is soluble in sodium sulphide with a brown colour but has 
little affinity 8 silen. 
The preparation and properties of azo- -dyes containing 
mercaptan groups.—By E. R. Warson and SiKHI 
Brusuan Durr 
parte, uew hydroxy mercaptans were prepared as 3 inte 
ates my Leuckart’s reaction on the corresponding aminophenols :— 
m. Hydroxy phenyl mercaptan, C,H, OH(1) SH(3) 
1 hs eae naphthyl mercaptan, C\y>H, OH(1) SH(5) 
and the pe ithe 4 were Seerabed from them: 
Benzidine disazo-m hydrox zy phenyl mercaptan whi ch is brownish 
yellow in colour, readity soluble in sodium sulphide and has good affinity 
for ie heed 
eigeeeeet disazo- #8 oe -naphthyl mercaptan is red but only 
sight y sol. in sodium sulphide and . little affinity for cotton. 
neidine disazon’ 2-hydroxy-7-naphthyl mercaptan is ~ but only 
slight y so sodium sulphide and ous little affinity for cotton. 
otineate 8azo- elle: id -naphthyl mercaptan is crimson, soluble 
he in caustic soda res um nears nd dyes cotton 
zidine ‘isan naphthol polysulphi ide was ee epared by ¢ te me 
di snotioedd benzidine with- “Diab thol polysulphide. It has a dull mar 
colour is soluble in son ium hydroxide and sodium sulphide but only aye 08 
light ve on cotto de 
ne- -azo-thioresorcin prepared by coupling diazobenzene canner 
and thioncabidt cin is yello he hadnt soluble in soda and sodium sulphide 
and has good affinity for c i 
Thiobenzidine. Sooke: bAapeahe 1, prepared by diazotising pap 
dine and couplin ne with- fon — is scarcely soluble in sodium sulphide 
and has little affinity for re 
berggs rutbiaedlaia Aspe. salt has the properties of a direct co 

Thi jobenzidine- disazo-L-naphthol — is brown, soluble in 
sodium sy e but has aes B rgewn for on. 
vehi: 4-mercaptan azo pagar ied phenyl-2-mercaptan CH 
NO,(3) (SH) —N=N— CH, SH(1) OH(4) “prepared by diazo pore 
nitro-4 aminophenyl mercaptan and coupling with-m-hydroxy P ey To 
moreaptan | is brown, soluble in sodium ainkids pat has good affinit 
cotto 
Thes ous mercaptan derivatives were prepared i in order to study 
ag effect 0 of mercaptan groups in the cated 2 to the azo-. — 
up to the present no such compounds had been prepared and analogy 
