126 COAL-TAR COLORS USED IN FOOD PRODUCTS. 



G. T. 480. 



Trade names. Soluble Blue; China Blue; Cotton Blue; Bleu 

 Marine; Water Blue; Water Blue 6 B extra; London Blue extra. 



Names under which it was offered on the United States market as a 

 food color in 1907. Pure Soluble Blue. 



Scientific name. Sodium, ammonium or calcium salt of the tri- 

 sulphonic acid (with some disulphonic acid) of triphenyl-rosanilin and 

 triphenyl-pararosanilin. 



Discovered and patented. 1862. 



Shade. Blue. Offered by 1 out of 12 sources. 



FAVORABLE. 



1. Permitted by law of Austria. 



2. LIBBER (p. 147): A guinea pig received 306 milligrams per kilogram body weight, 



or 214 grains per 100 pounds, once a day seven times every other day; the weight 

 remained substantially constant, a slight gain of less than f per cent being noted. 

 "Nothing irregular or disturbing whatsoever was observed during the whole 

 period. " 



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



grams received 30 grams dye in 30 days which amounts to 223 milligrams per 

 kilo per day or 156 grains per 100 pounds per day. Animal remained well 

 throughout; no loss of weight or appetite; urine normal color, stool deep blue; 

 killed with chloroform; autopsy showed a pea-green coloring of the cortex of 

 the kidneys. 



UNFAVORABLE. 



1. FRAENKEL (p. 574), quoting Penzoldt, says that it completely arrests germ devel- 



opment, and causes changes internally. 



2. SANTORI (Moleschott's Untersuchungen, 1895, v. 15, p. 46): Regards this as injurious 



hypodermically, but not through mouth. A dog weighing 4,000 grams received 

 3.5 grams of dye hypodermically in 16 days, at the end of which time he died; 

 this amounts to 55 milligrams per kilo per day or 38.5 grains per 100 pounds 

 per day. The autopsy showed the liver to be free from blood; kidneys soft 

 . and congested; all organs swollen and colored. 



G. T. 483. 



Trade names. Aurin; Rosolic Acid; Yellow Corallin. 

 Scientific name. Mixture of aurin (trioxytriphenyl-carbinol) oxi- 

 dized aurin, methylaurin, and pseudo-rosolic acid (corallin phthalin). 

 Discovered. 1834. 

 Shade. Yellowish brown. Not offered. 



FAVORABLE. 



1. LEWIN (Lehrbuch der Toxikologie, 1897, p. 231}'. Rosolic Acid is positively non- 

 poisonous. 



