124 



COAL-TAR COLORS USED IN FOOD PRODUCTS. 



Discovered and patented. 1862. 

 Shade. Blue. Not offered. 



FAVORABLE. 



1. SANTORI (Moleschott's Untersuchungen, 1895, v. 15, p. 45): A dog weighing 4,500 

 grams received 25 grams dye in 30 days, which amounts to 185 milligrams per 

 kilo per day, or 129.5 grains per 100 pounds per day. The urine remained of 

 normal color, but the stool was a deep blue black. Throughout the whole time 

 the animal was in perfect health. Killed with chloroform; autopsy showed 

 everything normal. 



UNFAVORABLE. 



Nothing. 



G. T. 478. 



Trade names. Bavarian Blue DSF; Methyl Blue, water-soluble; 

 Navy Blue B; Methyl Blue for silk MLB. 



Scientific name. Sodium salt of triphenyl pararosanilin di- and 

 tri-sulpho acid. 



Discovered. 1862; not patented. 



Shade. Blue. Not offered. 



Nothing. 



FAVORABLE. 



UNFAVORABLE. 



1. CHLOPIN (p. 170) examined this color, and on his own experiments classed it as 

 "nonpoisonous but not quite indifferent." 



Experimental data by Chlopin. 

 [1 gram=115 mg=81 grains.] 



Daily. 



