104 



COAL-TAR COLORS USED IN FOOD PRODUCTS. 



4. LIBBER (p. 138): A guinea pig received once a day six times every other day 

 241 milligrams per kilogram body weight, or 169 grains per 100 pounds body 

 weight; appetite remained good throughout, and aside from an occasional 

 thirstiness noted no untoward observations were recorded. 



G. T. 105. 



Trade names. Fast Red E; Fast Red. 



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

 food color in 1907. Claret Red RZ. 



Scientific name. Sodium salt of para-sulphonaphthalene-azo-beta- 

 naphthol-monosulphonic acid. 



Discovered and patented. 1878. 



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



FAVORABLE. 



1. Permitted by Confectioners' List. 



2. MEYER (/. Amer. Chem. Soc. 1907, v. 29, p. 898): Initial dose 100 milligrams per 



kilogram body weight or 70 grains per 100 pounds, and given three times 

 increased geometrically once before diarrhea was observed; there was no 

 albumen in the urine; urine was colored deep red; feces colored red at the 

 start, at the end of the experiment chocolate brown; autopsy showed all parts 

 to be substantially normal. 



3. CAZENEUVE AND LEPINE (Compt. rend., 1885^ v. 101, pp. 823-827): A. Dog: 



Weight 21.5 kilo, received as follows: 



Nothing abnormal except occasional greenish urine; no vomiting; no diarrhea. 

 B. Man: 1. One of the experimenters took 1 gram, dissolved in wine, daily 

 for 15 days; no effect. 2. A man aged 25, afflicted with albuminuria, received 

 the following: 



Caused colic without diarrhea; amount of urine or albumen not affected. 3. 

 Three men afflicted with Blight's disease received each daily for 8 days 1 gram; 

 no effect on the albumen. 4. A 30-year-old man chronic invalid took 4 grams 

 one day, 6 grams the next day; no effect was observed. 



