Mr. Noad on the Action of Nitric Acid on Cymol. 31 



Nitrotohiylate of Soda, like the corresponding salt of tolu- 

 ylic acidj I could not obtain in any definite crystalline form. 



Nitrotohiylate of Ammonia crystallizes out of its aqueous 

 solution in long needles ; it is very easily decomposed, losing 

 the whole of its ammonia ^yhen boiled with animal charcoal. 

 1 intend to return to the study of this salt, and hope to ob- 

 tain from it the body which I failed to procure from nitro- 

 toluylic aether, viz. nitrotoluylamide. 



Nitrotohiylate of Strontia. — This salt, which in appear- 

 ance is not to be distinguished from the corresponding baryta 

 salt, was formed by dropping chloride of strontium into neu- 

 tral nitrotohiylate of ammonia : it is rather more soluble in 

 boiling water than the baryta compound, and the crystals de- 

 posited on cooling are rather larger. 



Nitrotoluylate of Copper. — On adding solution of sulphate 

 of copper to perfectly neutral nitrotoluylate of ammonia a 

 basic salt is formed. I have not yet obtained a definite cop- 

 per salt of this acid. 



Action of a mixture of Sulphuric and Nitric Acids on Nitro- 

 toluylic Acid. 



When nitrobenzol is boiled repeatedly with the strongest 

 nitric acid it loses an atom of hydrogen, in the place of which 

 another atom of hyponitric acid enters. The transformation 

 proceeds very slowly. The new substance (dinitrobcnzol) is 

 however obtained very speedily, as Drs. Muspratt and Hof- 

 mann* have shown, by dropping benzol or nitrobenzol into 

 a mixture composed of equal parts of fuming nitric acid 

 and concentrated sulphuric acid as long as the liquid re- 

 mains homogeneous. This method has lately been employed 

 with great success by M. Cahours, who, amongst many 

 other interesting products, has obtained trinitranisic acid, 



^i«{_3(n6i)J ^6? ^'"^^^°'^"'^^"^'' ^^^^^' ^2o|2(N04)J^4; 

 and dinitrobenzoic acid, C,4< o^\) f ^4- ^^ appeared inter- 

 esting to submit nitrotoluylic acid to a similar treatment, but 

 after digesting the acid with the mixture for several days 

 the anticipated transformation had not taken place, the 

 numbers obtained by analysis being those given under 111., 

 "composition of nitrotoluylic acid." 1 intend however to 

 repeat this experiment. 



Distillation of Toluylic Acid with Baryta — Toluol. 

 Although the preceding analyses of toluylic and nitroto- 

 * Mem. Chem. Soc. vol. iii. p. 111. 



