148 COAL-TAR COLORS USED IN FOOD PRODUCTS. 



FAVORABLE. 



1. Permitted by Confectioners' List. 



2. Permitted by the law of Italy. 



UNFAVORABLE. 



1. FRAENKEL (p. 571}: "However, pure Indigo, according to Robert, is, in finely 

 divided condition, a violent local irritant." 



G. T. 692. 



Trade names. Indigo Carmine; Indigo Extract; Indigotin. 



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

 food color in 1907. Indigo Carmine Powder IN; Indigotin; Indi- 

 gotin A. 



Scientific name. Sodium salt of Indigotin disulphonic acid or the 

 free acid. 



Discovered. 1740. 



Shade. Blue. Offered by 3 out of 12 sources. 



FAVORABLE. 



1. SCHACHERL (p. 1046): " No objection to its use." 



2. SANTO RI ( MoleschotV s Untersuchungen. 1895, v. 15, p. 41): A dog weighing 4,500 



grams received 90 grams dye in 30 days; vomited twice during the examina- 

 tion; no change in weight; animal killed with chloroform; autopsy showed 

 slight dull swelling in the epithelium and convoluted canals of the kidneys. 

 This dosage amounts to 667 milligrams per kilo per day, or 467 grains per 100 

 pounds per day. Classes it as harmless. 



ALPHABETICAL INDEX OF TRADE NAMES OF COAL-TAR COLORS. 



The following list of the trade names of coal-tar colors appearing 

 in the foregoing ' compilation on physiological action is complete 

 when supplemented by the list of 23 colors given on page 227; 

 Green Table numbers in parenthesis. 



Acetin Blue (599). 

 Acid Brown (138). 

 Acid Green (434,435). 

 Acid Green ex. cone. (435). 

 Acid Green cone. (435). 

 Acid Green cone. VN (435). 

 Acid Green cone. 780 (435). 

 Acid Fuchsin (462). 

 Acid Magenta (462). 

 Acid Magenta powd. (462). 

 Acid Rosein (462). 

 Acid Rubin (462). 

 Acid Violet (467). 

 Acid Violet 6 B (467). 

 Acid Yellow (8). 

 Acid Yellow AT (94). 

 Acid Yellow D (88). 



Acid Yellow G (8). 

 Acid Yellow G pat. (8). 

 Acme Yellow (84). 

 Alizarin Blue ABS (563). 

 Alizarin Blue S (563). 

 Alizarin Green (527). 

 Alphanaphthol Orange (85). 

 Alsace Green (394). 

 Amaranth (107). 

 Amaranth B (107). 

 Anilein (593). 

 Anilin Blue Sp. Sol. (457). 

 Anilin Orange (2). 

 Anilin Purple (593). 

 Anilin Red (448). 

 Anilin Yellow (4). 

 Anilin Yellow S (4). 



