302 INORGANIC AGENTS 



Derivation. — Glacial acetic acid and aniline are distilled 

 together, and the residue is purified hj repeated crystalliza- 

 tion. H C,H30, + CeH,N H, = C,H,N H. C3H3O + H,0. 



Properties. — White, shining micaceous crystalline lami- 

 nae, or a crystalline powder, odorless, having a faintly 

 burning taste, and permanent in the air. Soluble in 194 

 parts of water, and in 5 parts of alcohol ; also soluble in 18 

 parts of ether, and easily soluble in chloroform. 



Dose.—^., 3i.-ii. (4.-8.); Sh. & Sw., 3ss.-i. (2.-4.); D., 

 gr.iii.-vii. (.2-.5). 



Phenacetinum. Phenacetin. C.oHi^^N 02(178.63). (B.P.) 

 (Non-official, U. S. P.) 



Synonym. — Para-acetphenetidin, CgH^O C2H5N H CjHjO 

 -f H,0 (178.63). 



Derivation. — Obtained by the action of glacial acetic 

 acid upon parapheuatitin, a phenol derivative. 



H C,H30, + CeH,0 C,H,N H = GJl.O C,H,N HC,H30 

 -f H,0. 



Properties. — Glistening, colorless, tasteless, odorless, 

 scaly crystals. Practically insoluble in water ( 1-1700 ), 

 soluble in 30 parts of alcohol, and in glycerin, chloroform 

 and acetic acid. 



Dos€.—B.. k C, 3ii.-iii. (8.-12.); D., gr.v.-x. (.3-.6). 



Antipyrinum. Antipyrin. CgHj (C 113)2 C3H NjO. 

 (Non-official, U. S. P.) 



Synonym. — Phenazonum, B. P.; phenyl- dimethyl-pyra- 

 zolone. 



Derivation. — Phenyl-hydrazine is acted upon by aceto- 

 acetic ether, when phenyl -monomethyl- pyrazolone, ethyl 

 alcohol and water result. 



H^N N H CeH, + C H3C O C H^ C O O C^H, = CeH, 

 (C H3) C3H2N2O + C^H, O H + H^O. Then CeH, (C H3) 

 C3H2N2O + C H3 1 (methyl iodide) = CeH, (C H,)^ C3H N^O 

 + HI. 



