DERIVATIVES OF ETHYL ALCOHOL. 51 



exact amount of sulphuric acid required. The acid 

 can, however, only be concentrated in a vacuum at the 

 ordinary temperature. It forms a thick, very strongly 

 acid liquid. The watery solution is resolved, by heat 

 ing, into alcohol and sulphuric acid. Its salts are 

 soluble in water, the alkaline salts also in alcohol. 

 The barium ,saft (C 2 IP.S0 4 ) 2 Ba-f 21PO forms large lami 

 nated crystals. 



Ethyl sulphite, (C 2 IP) 2 S0 3 , is formed by the action 

 of sulphur chloride S 2 C1 2 or chlorothionyl SOC1 2 on 

 alcohol. Liquid, boiling at 160 ; of specific gravity, 

 1.106 ; of a peppermint odor ; is decomposed gradually 

 by water. 



&quot;An ether isomeric with this, ethylsulphonic ether 

 (C 2 H 5 ) 2 S0 3 , is produced by the action of sodium 

 ethylate on ethylsulphonchloride. Colorless liquid; 

 boiling at 207-208 ; of specific gravity, 1.1712. 



Ethylsulphurous acid, C 2 H 5 .S0 2 .OH, is formed 

 by the oxidation of mcrcaptan, ethyl sulphide, and 

 ethyl sulphocyanide by means of nitric acid ; by the 

 action of zinc ethyl on sulphurous acid or sulphuric 

 anhydride. The potassium salt is formed by boiling 

 ethyl iodide with a concentrated solution of potassium 

 sulphite. Crystalline, very deliquescent mass, much 

 more stable than ethylsulphuric acid. Its solution can 

 be evaporated on a water bath. By oxidation it is con 

 verted into ethylsulphuric acid. Its salts are all 

 easily soluble and are decomposed only at a high tem 

 perature. The lead salt (C 2 II 5 S0 3 ) 2 Pb forms colorless 

 laminae, soluble in alcohol and water. 



Ethylsulphonchloride, C 2 IPS0 2 C1. Is produced 

 by the action of phosphorus pentachloride on potassium 

 ethylsulphite. Colorless liquid, boiling at 173. 5. 



Ethyl phosphate, (C 2 H 5 .0) 3 PO, is formed by the 

 action of phosphoric anhydride on absolute alcohol in 

 the presence of ether; by heating silver phosphate 

 with ethyl iodide ; and by heating lead diethylphos- 



