138 



COAL-TAR COLORS USED IN FOOD PRODUCTS. 



Scientific name. Mixtures of the sodium salts of the sulphonic 

 acids of the various spirit-soluble indulins. 

 Discovered and patented. 1867. 

 Shade. Bronzy or Blue Black. Offered by 1 out of 12 sources. 



FAVORABLE. 



1. CHLOPIN (pp. 198-9): On his own experiments classifies this color as non poisonous. 

 The experimental data are as follows: 



Experimental data by Chlopin. 



No.i. 

 [1 gram= 54 mg= 38 grains.) 



No. 2. 

 [1 gram=114 mg=80 grains.] 



UNFAVORABLE. 



1. SANTORI (Moleschott's Untersuchungen, 1895, v. 15, p. 55}: A dog weighing 4,500 

 grams received 4 to 6 grams dye in 7 days, which amounts to 127 to 190 milli- 

 grams per kilo per day, or 89 to 133 grains per 100 pounds per day. No vomiting. 

 Stool black blue and no change in the urine. Up to*the sixth day the animal, 

 in very good general condition, ate heartily and was quite lively; temperature 

 unchanged. On the morning of the sixth day the animal was found in his cage 

 suffering from general muscular cramps which were heightened by the slightest 

 noise; the animal did not respond to calls or threatening movements and was in 

 a complete stupor. This continued for 24 hours, when the animal died. The 

 autopsy showed numerous punctures of the lungs and of the mucous membrane 

 of the stomach; fatty degeneration of the liver and little blood in it; kidneys 

 without change, although the cortex was colored a light green. 



