52 DERIVATIVES OF ETHYL ALCOHOL. 



phate to 200. Is prepared most readily by the action 

 of phosphorus oxichloride on sodium ethylate. Clear, 

 transparent liquid ; soluble in water, alcohol and ether. 

 Boiling point, 211; specific gravity, 1.072 (at 12). 

 Is decomposed slowly by water. 



Diethylphosphoric acid, (C 2 H 5 .0) 2 PO.OH, is formed 

 when phosphoric anhydride is allowed to slowly absorb 

 the vapor of alcohol. By neutralizing the liquid, 

 diluted with water, with lead carbonate, the soluble 

 lead salt [(C 2 H 5 ) 2 P0 4 ] 2 Pb is obtained, which crystallizes 

 in needles. The free acid decomposes by evaporation. 

 Monobasic acid. 



Ethylphosphoric acid, C 2 H 5 .O.PO(OH) 2 , is formed 

 by heating a mixture of syrupy phosphoric acid and 

 alcohol. Strongly acid, thick liquid. Its aqueous 

 solution does not undergo decomposition by boiling. 

 Bibasic acid. The barium salt C 2 H 5 .P0 4 Ba crystallizes 

 in prisms, and is soluble in water. 



Ethylphosphoric chloride, C 2 H 5 .O.POC1 2 . Is pro- 

 duced by conducting chlorine into a mixture of 1 

 molecule of PCI 3 and 2 molecules of alcohol. Liquid, 

 boiling at 167. 



Ethyl phosphite, (C 2 H 5 .0) 3 P, is produced when 

 sodium ethylate and phosphorus terchlorideare brought 

 together; and by the action of phosphorus cyanide on 

 alcohol. Boiling point, 191 ; specific gravity, 1.075. 

 By the action of phosphorus terchloride on alcohol is 

 produced ethylphosphorous chloride C 2 H 5 .O.PC1 2 . Color- 

 less liquid ; specific gravity, 1.316 ; boiling point, 117. 

 Is resolved rapidly by water into hydrochloric acid, 

 phosphorous acid, and alcohol. Yields with bromine 

 ethyl bromide and PCPBrO. 



Ethyl arsenate, (C 2 H 5 .0) 3 AsO, is formed when silver 

 arsenate is heated with ethyl iodide to 120. Color- 

 less liquid ; boils with slight decomposition at 235- 



