REASONS FOE SELECTING SEVEN PERMITTED COLORS. 



161 



both are nonsulphonated azo-colors; in Fraenkel's opinion, however, 

 such a comparison is wholly justified and proper. 



Excluding now 17, 18, 41, 197, and 201 for the purposes of com- 

 parison, the following tabulation is made: 



Oil-soluble nonsulphonated azo-colors on the market, 1907, deemed poisonous by Fraenkel. 



That is, the only ones on the United States market concerning 

 which no expression of specific opinion is to be found in Fraenkel are 

 the following three: anilin-azo-resorcin, toluidin-azo-b-naphthylamin, 

 and anilui-azo-b-naphthylamin, and nothing is published on the 

 physiological action of any of them specifically. The probability, 

 however, would seem to be that they are not harmless, and until 

 their harmlessness is positively established their exclusion from the 

 permitted list of coal-tar colors for use in foods seems to be the only 

 safe and proper course to be followed. The physiological action of 

 so-called "Butter Yellow" No. 16 of the Green Tables (see p. 85), 

 merely strengthens this conclusion. 



XII. BTTLES AND REASONS FOR SELECTING THE SEVEN COLORS 

 PERMITTED BY F. I. D. 76. 



STATEMENT OF RULES. 



In view of the confusion and uncertainty disclosed in the foregoing 

 literature relative to the physiological action of coal-tar colors, the 

 difficulties in the way of making a list of coal-tar colors to be 

 permitted in the coloring of food products are seen to be by no 

 means slight. The following rules governing selection were in mind 

 during the making of the list given in Food Inspection Decision No. 76, 

 and the closeness with which they were followed is discussed on 

 page 166. 



Rule I. All colors which have not been physiologically tested either 

 upon animals or man shall not be permitted for use in foods. 



Rule II. All coal-tar colors which have been examined physio- 

 logically with contradictory results shall not be permitted for use in 

 foods. 



97291 Bull. 14712- 



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