SA.LICIN 467 



Salicinum. Salicin. Ci3H,,0,. (U. S. & B. P.) 



A neutral principle (glucoside) obtained from several 

 species of Salix and Populus (nat. ord. Salicacese). 



Habitat. — Europe, but cultivated in North America. 



Derivation. — Obtained from a decoction of willow bark. 

 Salicin crystallizes on evaporation, after removal of tannin 

 by agitation with lead oxide. It is purified by repeated 

 solution and crystallization. 



Properties. — Colorless, or white, silky, shining crystal- 

 line needles, or a crystalline powder ; odorless, and having 

 a very bitter taste. Permanent in the air. Soluble in 28 

 parts of water, and in 30 parts of alcohol ; almost insoluble 

 in ether or chloroform. 



Dose.—Bi. & C, 3ii.-!i. (8.-30.); Sh., 3i.-iv. (4.-15.); 

 Sw., 3 ss.-i. (2.-4.) ; D., gr.v.-xxx. (.3-2.). 



SoDii Salicylas. Sodium Salicylate. Na C.H.Og. 

 (U. S. & B. P.) 



Synonym. — Silicylate de soude, Fr.; natrium salicyli- 

 cum, G. 



Derivation. — Made by the action of salicylic acid on 

 sodium carbonate. 2 HC,H303 + Na^CO, = 2 Na C:H,03 + 

 H2O + CO2. The solution is filtered, and heated to expel 

 carbon dioxide. 



Properties. — A white, amorphous powder ; odorless, and 

 having a sweetish, saline taste. Permanent in cool air. 

 Soluble in 0.9 part of water, and in 6 parts of alcohol ; very 

 soluble in boiling water or alcohol ; also soluble in glycerin. 



Dose. — Same as salicin. 



Salol. Salol. CeH,C,H,03. (U. S. P.) 



Synonym. — Phenyl salicylate, salicylic ether of phenol. 



Derivation. — Made by heating salicylic and carbolic 

 acids with phosphorus pentachloride. 



Properties. — A white, crystalline powder; odorless, or 

 having a faintly aromatic odor, and almost tasteless. Per- 



