774 ETHYL. 



weight of water, also in dilute alcohol, but insoluble in anhy- 

 drous alcohol and ether ; above 212 it undergoes decomposition 

 without entering into fusion. 



Sulphate of oxide of ethyl, and barytes, BaO,EO + S 2 O 6 

 + 2HO, crystallizes in plates or rhomboidal prisms, persistent 

 in air, and having a very acid taste. 



Sulphate of oxide of ethyl, and lime, CaO,EO + S 2 O 6 + 2HO. 

 Five parts of this salt dissolve in 4 parts of water at 62.6 (17 

 cent.) ; it is also soluble in alcohol with the aid of heat. 



Sulphate of oxide of ethyl, and oxide of lead, PbO,EO +S 2 O 6 

 + 2HO, crystallizes in large transparent tables, very soluble both 

 in water and alcohol, and having an acid re- action. It slowly 

 undergoes spontaneous decomposition, and becomes viscid from 

 the formation of oil of wine. It dissolves an additional atom of 

 oxide of lead, and becomes a basic salt, which becomes a white 

 mass, and is very soluble. 



Acid phosphate of oxide of ethyl, phosphovinic acid, 2HO,EO 

 + PO 5 , is formed on mixing alcohol with a concentrated solu- 

 tion of phosphoric acid, with the evolution of much heat; if the 

 phosphoric acid is diluted so that its density does not exceed 

 1.2, it is not in a state to decompose alcohol. Phosphovinic 

 acid is a colourless, syrupy liquid, of an acrid and very acid 

 taste, more stable than sulphovinic acid, as it may be boiled 

 without decomposition, even when diluted. At a higher tempe- 

 rature it is decomposed, giving first ether and alcohol, then 

 inflammable gases and a carbonaceous residue. When phos- 

 phovinic acid is treated with metallic oxides, the two atoms of 

 basic water which it contains are separated and replaced by fixed 

 base, while the oxide of ethyl remains, a tribasic class of salts 

 being formed like the ordinary phosphates. The formula of the 

 phosphate of ethyl and barytes is 2BaO,EO + PO 5 + 12HO. The 

 compounds of pyrophosphoric acid and metaphosphoric acid 

 with oxide of ethyl have not yet been obtained (Pelouze) . 



Arseniate of oxide of ethyl, arseniovinic acid, HO,2EO 

 + As O 5 , contains 2 atoms of oxide of ethyl and 1 atom of 

 basic water, which last may be replaced by fixed bases (D'Arcet). 



Nitrite of oxide of ethyl, nitrous ether, C 4 H 5 O + NO 3 = 

 EO,NO 3 . Nitric acid decomposes alcohol without combining 

 with it. This ether may be obtained, however, by distilling 3 parts 

 of strong alcohol with 2 parts of nitric acid of density 1 .3, apply- 

 ing occasionally a very gentle heat, and condensing in a receiver 



