296 PHENOL. 



Barium disulphophenolate, C 6 H 4 S 2 7 Ba + 4H 2 0. 

 Colorless, shiny, monoclinate prisms. Easily soluble in 

 hot water, less soluble in cold. 



Phenyl sulphydrate (Benzene sulphydrate), C 2 H 6 S 

 = C 6 H 5 .SH. Is produced by the action of hydro- 

 gen (tin and hydrochloric acid, zinc and dilute sul- 

 phuric acid) on benzene sulphochloride (p. 269) ; by the 

 distillation of phenol over phosphorus pentasulphide ; 

 and by the distillation of sodium sulphobenzolate. 

 Colorless liquid, of an unpleasant odor; boiling point, 

 166-168 ; specific gravity, 1.08. Insoluble in water, 

 easily soluble in alcohol and ether. Dissolves sodium 

 easily ; and, when treated with mercury oxide, gives a 

 compound (C 6 H 5 S) 2 Hg, that crystallizes from alcohol 

 in white, shiny needles. 



Parabromphenyl sulphydrate, C 6 H 4 Br.SH. Is 

 formed in the same way from parabrombenzene sul- 

 phochloride. Colorless, lamellar crystals ; fusing point, 

 93.5. 



Phenyl sulphide (Benzene sulphide), (C 6 H 5 ) 2 S. Is 

 formed, together with benzene and phenyl sulphy- 

 drate, in the destructive distillation of sodium sulpho- 

 benzolate ; and in the distillation of phenol over phos- 

 phorus sulphide. Is further produced by heating 

 several of the metallic compounds of phenyl sulphy- 

 drate. Colorless liquid, of an unpleasant odor ; boiling 

 point, 292 ; specific gravity, 1.12. Insoluble in water, 

 easily soluble in hot alcohol and ether. 



Phenyl disulphide, (C 6 H 5 ) 2 S 2 . Is produced in 

 small quantity in the preparation of phenyl sulphy- 

 drate from benzene sulphochloride ; and can be readily 

 obtained from the sulphydrate by oxidation with di- 

 lute nitric acid. Is also formed, when a solution of 

 the sulphydrate, in alcoholic ammonia, is allowed to 

 evaporate spontaneously in the air. It is further 

 formed when iodine is added to an aqueous solution of 



