130 M. Duclos on Cresylic Alcohol. 



tained in beautiful carmine-red laminae with a green lustre, and 

 which appear under the microscope in acute rhombic columns. 



Amiilonitrochlorophemjlic Acid, C»2 H-'' CI NH^ (NO^) 0^. — 

 When dinitrochlorophenylic acid is digested with sulphide of 

 ammonium, the solution assumes a blood-red colour, and sulphur 

 is deposited. On evaporating the filtrate and adding acetic acid, 

 this acid is obtained. It is not very soluble even in hot water, 

 and crystallizes out on cooling in yellow silky needles. 



By passing a current of nitrous acid through a solution of this 

 acid, it is transformed into a new acid, which the author names 

 diazonitrochlorophenylic acid, 



C'2H3Cl(NH2)(NO»)02 + N03=:Ci2H2ClN2(N04)02 + 3HO. 

 AmiJonitrochlorophenylic Diazonitrochlorophenylic 



acid. acid. 



The author views this acid as being derived from nitrochloro- 

 phcnylic acid, C'^ H" CI (NO*) 0^, by the substitution of two 

 atoms of hydrogen by two atoms of nitrogen. 



In an investigation of the creosote from coal-tar oil, Tairlie 

 established the existence of a new alcohol, C'^IPO^, hydrated 

 oxide of cresyle, homologous with hydrated oxide of phenyle. 

 Duclos* has confirmed the existence of this alcohol in coal-tar 

 creosote, and has further found that it is contained in wood-tar 

 creosote. The crude wood-tar was rectified, and the distillate 

 between 150° and 220° C. collected. By treating this with solu- 

 tion of soda the neutral oils were removed, and the soda solution 

 was decomposed with sulphuric acid. This treatment was re- 

 peated until the product was quite soluble in soda. It was then 

 washed with water, dried over chloride of calcium, and fraction- 

 ally distilled, by which a fraction boiling at 187° consisting of 

 phenylic alcohol, and one boiling at 203° consisting of cresylic 

 alcohol, were obtained. 



In his description of the properties of cresylic alcohol, Duclos 

 confiirms the statements of Fairlief, but observes, contrary to 

 what had been stated by Gerhardt, that cresylic alcohol is about 

 as soluble in ammonia as phenylic alcohol. 



Potassium liberates hydrogen from cresylic alcohol, and forms 

 a deliquescent crystalline mass consisting of fine needles. Cre- 

 sylic alcohol dissolves in sulphuric acid with a reddish-brown 

 colour and formation of sulphocresylic acid, the lead and baryta 

 salts of which do not crystallize. 



Mononitrocresylic Acid, C^"* H'^ (NO*) 0^, is obtained by the 

 cautious addition of very dilute nitric acid to an aqueous solu- 

 tion of cresylic alcohol. It is a yellowish-brown liquid of a 



* Liebig's Annalen, February 1859. f Ibid. 



