CARBOLIC ACID 



307* 



hydrate de phenyle, Fr.; carbolsaure, pheoylsaure, phenyl 

 alkohol, G. 



Derivation. — Obtained from crude carbolic acid by 

 agitation with caustic soda, heating to 338° F., and adding 

 hydrochloric acid. Then by agitation with sodium chloride, 

 digestion with calcium chloride, and distillation at a tempe- 

 rature between 336° F. and 374° F., and finally by crystalli- 

 zation. 



Properties. — Colorless, interlaced, or separate, needle- 

 shaped crystals, or a white crystalline mass, sometimes 

 acquiring a reddish tint ; having a characteristic, somewhat 

 aromatic odor, and when copiously diluted with water, a 

 sweetish taste with a slightly burning after-taste. Delique- 

 scent on exposure to damp air. Soluble in about 15 parts 

 of water, and very soluble in alcohol, ether, chloroform, 

 glycerin, fixed and volatile oils. Faintly acid reaction. 



Phenol crystals melt when heated, but solidify again on 

 cooling. A 95 per cent, solution of carbolic acid crystals, 

 in alcohol, remains fluid at the ordinary temperature. The 

 crystals are also liquified by the addition of about 8 per 

 cent, of water. 



Dose. — H. & C, gr.xv.-xxx. (1.-2.) ; Sh. & Sw., gr.v.-x. 

 (.3-.6); D., gr.ss.-i. (.03-.06). 



PREPARATIONS. 



1. — Unguentum Acidi Carholici. Ointment of Carbolic Acid. 

 (U. S. &B. P.) 



Carbolic acid, 5; ointment, 95. (U. S. P.) 



2. — Glyceritum Acidi Carholici. Glycerite of Carbolic Acid. 



(U. S. & B. P.) 

 Carbolic acid, 20; glycerin, 80. (U. S. P.) 



3. — Acidum Carholicum Lique factum. Liquified Carbolic Acid. 



(B. P.) 

 Carbolic acid liquified by addition of 10 per cent, of water. 

 Dose. — Same as acidum carbolicum. 



Action External. — Carbolic acid causes burning pain 

 when applied to the skin or mucous membranes, and this 



