166 COAL-TAR COLORS USED IN FOOD PRODUCTS. 



ted for use in food products because they are harmful : 1 ; 2 ; 3 ; 6 ; 86 ; 

 95; 425; 451; 454; 480; 483; 484; 487; 488; 490; 571; 584; 599; 

 620; 624; 650. The same paper, however, recommended that Nos. 

 584 and 650 be permitted for use in food products; that No. 86, sug- 

 gested by both the other recommendations, be prohibited; and that 

 Nos. 95, 451, and 480, suggested by one or the other of the remaining 

 two recommendations, be likewise prohibited for use in food products. 

 It must be clear to everyone that these three recommendations are 

 not of one mind as to (1) the colors which are harmless; (2) the 

 colors which are harmful; (3) the colors which are used or are useful 

 in food coloring; and (4) the colors which should be used in food 

 coloring. Such a state of affairs fully justifies rules of the scope and 

 intent of those formulated at the beginning of this section for making 

 a selection of permissible food colors. 



PROCESS OF ELIMINATION. 



From the foregoing data it appears that out of 80 different chemical 

 individuals on the food-color market of the United States in 1907, 

 only 16 had been examined physiologically with a favorable result 

 (see p. 64). 



These 16, arranged according to the shade produced, are as follows 

 (numbers preceding the names are the Green Table numbers; the 

 numbers hi parentheses show the number of sources desiring the color; 

 the italicized Green Table numbers are the ones finally selected by 

 Food Inspection Decision No. 76) : 



65. Fast Red B (Alphanaphthylamin azo-R-salt) (2). 

 103. Azorubin S (Naphthionic acid azo NW acid) (6). 

 105. Fast Red E (Naphthionic acid azo-Schaeffer acid) (1). 

 107. Amaranth (Naphthionic acid azo-R-salt) (7). 



169. Crocein Scarlet 7B (Amidoazotolutol-monosulphonic-acid-azo-betanaphthol- 

 monosulphonic acid B) (1). 



240. Congo Red (Benzidin disazo-naphthionic acid) (1). 

 462. Acid Magenta (Magenta trisulphonic acid) (2). 

 512. Eosin A (Tetra-bromo-fluorescein) (3). 

 517. Erythrosin (Tetra-iodo-fiuorescein) (5). 

 520. Rose Bengal (Dichlor-tetraiodo-fluorescein) (2). 



ORANGE. 



85. Orange I (Sulphanilic acid azo -alpha-naphtholj (2). 



YELLOWS, 



4. Naphthol Yellow (Dinitroalphanaphtholsulpho acid) (10). 

 89. Brilliant Yellow S (Sulphanilic acid azo-diphenylamin, sulphonated) (1). 



GREENS. 



433. Guinea Green B (Benzyldehyde + benzylethyanilin sulpho-acid) (1). 

 435. Light Green S F yellowish (Benzyldehyde+benzylethylanilin-f-sulphona- 

 tion) (4). 



