APPENDIX 365 



Note. When making up the stock solution or dilutions from the 

 stock solution always have a bottle of ethyl alcohol at hand as a remedy 

 for burns caused by phenol. 5% phenol is prepared by adding one 

 part of 95% phenol to nineteen parts of distilled water. 



Its value as a disinfectant is increased by the fact that 

 it acts in the presence of albuminous substances. It does 

 not corrode metals or destroy fabrics in a 5% solution. 



Liquor cresolis compositus, U. S. P. 



Cresol 500 gms. 



Linseed oil 350 gms. 



Potassium hydroxide 80 gms. 



Water, a sufficient quantity to make 1000 gms. 



Dissolve the potassium hydroxide in 50 gms. of water 

 in a tared dish, add the linseed oil, and mix thoroughly. 

 Then add the cresol and stir until a clear solution is pro- 

 duced. Finally add sufficient water to make the finished 

 product weigh 1000 gms., or more briefly: mix equal parts 

 by weight of cresol and linseed oil-potash soap (Sapo mollis, 

 U. S. P.). 



This mixture is a thick, dark, amber-colored fluid which 

 mixes readily with water in all proportions to form a clear, 

 soapy solution. A 3% or 4% solution will accomplish the 

 same results as 5% phenol. It is not interfered with by 

 albuminous substances and does not destroy metals or 

 fabrics. 



Tincture of iodin, U. S. P. 



lodin '. . . 70 gms. 



Potassium iodid 50 gms. 



Alcohol, sufficient to make 1000 c.c. 



Triturate the iodin and potassium iodid in a mortar 

 to a coarse powder and transfer at once to a graduated 

 flask. Rinse the mortar with several successive portions 



