PARA-OXYBENZOIC ACID. 347 



Ethyl oxybenzoate, C 6 H 4 | QQQJJ Colorless 



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

 insoluble in cold water, moderately soluble in boiling 

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

 yields a colorless, crystalline, easily soluble sodium 



compound C 6 H 4 | QQ Q Q 2 jj 5 



{O PTT3 

 CO OH 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. 



Ethyloxybenzoic acid, C 6 H 4 j QQ'OH Colorle88 

 needles; fusing point, 137. 



Acetyloxybenzoic acid, C 6 H 4 j QQ Q H Colorless 

 crystals ; fusing point, 127. 



{OTT 

 CO OH 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- 



