146 COAL-TAR COLORS USED IN FOOD PRODUCTS. 



Experimental data by Chlopin Continued. 



No. 2. 

 [1 gram=133 mg=83 grains.] 



1 By mouth. 



2 Subcutaneously. 



DOUBTFUL. 



1. WINOGRADOW (Zts. Nohr. Genussm., 1903, v. 6, p. 589) says it noticeably retards 

 digestive action; is not indifferent. 



G. T. 670. 



Trade names. Vidal Black; Vidal Black S. 



Scientific name. Possibly the sulpho-hydro derivative of a 

 polythiazin. 



Discovered. 1893. 



Shade. Green. Not offered. 



Nothing. 



FAVORABLE. 

 UNFAVORABLE. 



1. CHLOPIN (p. 208) examined this color, and on his own experiments classes it 

 "very harmful." The experimental data are as follows: 



Experimental data by Chlopin. 

 [1 gram=132 mg=92 grains.] 



