122 SOAPS FOR ABSORPTION OF BROMINE VAPOR. CREIGHTON. 



From the figures in the foregoing table, it will be observed 

 that all the soaps are better absorbents of bromine vapor 

 than is soda lime, a substance commonly employed for this 

 purpose. It will further be noted that those soaps contain- 

 ing a high percentage of sodium oleate, such as "White 

 Castile" soap and pure sodium oleate, and those containing 

 a high percentage of solium oleate and sodium resinate, 

 such as brown laundry soaps and pure sodium resinate, have 

 the greatest capacity for absorbing bromine. It is evident 

 from the values in the foregoing table, that the efficacy of 

 soaps in absorbing bromine vapor is due to the presence of 

 the unsaturated carbon atoms of oleic and resin acids. 



In view of the large capacity of soaps prepared from 

 oleic and resin acids for absorbing bromine vapor, the writer 

 recommends their use in the laboratory for this purpose, 

 and suggests that such soaps, or pure sodium oleate or sodium 

 resinate, might be employed with advantage in masks as 

 protection against breathing bromine vapors. 



