PARA-OXYBENZOIC ACID. 347 



Ethyl oxybenzoate, C 6 H 4 j 0Q^g Colorless 



plates; fusing point, 72 ; boiling point, 282; almost 

 insoluble in cold water, moderately soluble in boiling 

 water. Treated witb cold, concentrated soda-ley, it 

 yields a colorless, crystalline, easily soluble sodium 



compound C 6 II 4 j QQ Q Q 2 jj 5 



Methyloxybenzoic acid, C 6 H 4 j QQ^ The 



potassium salt is obtained by heating one molecule 

 oxybenzoic acid with two molecules potassium hydrox 

 ide and two molecules methyl iodide to 140, and de 

 composing the ether thus formed by means of potassa- 

 ley. The sodium salt is formed by the simultaneous 

 action of sodium and carbonic anhydride on the 

 methyl ether of monobromphenol. The acid, precipi 

 tated from these salts by means of hydrochloric acid, 

 crystallizes in long, colorless needles. But slightly 

 soluble in cold water, easily soluble in hot water and 

 in alcohol. Fuses at 95, and sublimes without decom 

 position. 



{O C 2 H 5 

 CO OH Colorless 



needles; fusing point, 137. 



Acetyloxybenzoic acid, C 6 H 4 j ^Q QJJ Colorless 

 crystals ; fusing point, 127. 



3, Para-oxybenzoic acid, C 6 H 4 j ^Q QJJ Is pro 



duced by conducting nitrous acid into a boiling, very 

 dilute, aqueous solution of para-amidobenzoic acid ; and 

 by fusing anisic acid, paraiodo-, and parasulphobenzoic 

 acids, para-cresol, phloretic acid, amidohydrocinnamic 

 acid, and a number of resins (gum-benzoin, aloes, 

 dragon s blood, acaro id) with potassium hydroxide. 

 Is much more easily soluble in cold water than sali- 



