PYROXYLIN 611 



Pyroxyunum. Pyroxylin. (U. S. & B. P.) 



Synonym. — Gun cotton, soluble gun cotton, colloxylin. 



Derivation. — Made by maceration of purified cotton, 

 100 ; in a mixture of nitric acid, 1400 ; and sulphuric acid, 

 2200 ; at a temperature of 32° C. (90° R), until a sample is 

 soluble in a mixture of 1 volume of alcohol and 3 volumes of 

 ether; washing with cold and boiling water, draining, and 

 drying in small pellets. 



PREPARATIONS. 



Oollodium. Collodion. (U. S. & B. P.) 

 Pyroxylin, 30; ether, 750; alcohol, 250. Made by solution, agita- 

 tion, and decantation of clear portion. 



CoUodium Cantharidatum. ('antharidal Collodion. (U. S. P.) 

 Synonym. — Blistering collodion. 



Made by percolation of cantharides, 60 ; with chloroform, distilla- 

 tion of the chloroform and evaporation of the residue until it weighs 

 15 (Gm.), and solution in flexible collodion, 85. 



Collodium Flexile. Flexible Collodion. (U. S. & B. P.) 

 Mix collodion, 920; Canada turpentine, 50; and castor oil, 30. 

 (U.S. P.) 



Collodium Stypticum. Styptic Collodion. (U. S. P.) 

 Mix tannic acid, 20; alcohol, 5; ether, 25; add collodion to make 

 100, 



Action and Uses. — Collodion, when painted on dry skin, 

 rapidly dries and leaves a thin, protective coating. It is a 

 useful agent to seal and secure coaptation of small wounds 

 and to keep them aseptic. Also to protect abraded surfaces, 

 as fissures of teats. Flexible collodion is less apt to crack. 

 Collodion contracts the superficial tissues and will often 

 abort boils when applied directly over them. Collodion is 

 employed as a vehicle for the application of many other 

 agents, as corrosive sublimate, carbolic acid, iodoform, etc. 



EuPHORBiUM. Euphorbium. (Non-official.) 



The dried juice of a cactus-like plant, Euphorbium 

 resinifera, growing in Morocco and regions contiguous to the 



