190 



COAL-TAB COLORS USED IN FOOD PRODUCTS. 



Analytical data recalculated to parts per hundred of coloring matter present Continued. 



GREEN TABLE NO. 435. LIGHT GREEN SF YELLOWISH. 



GREEN TABLE NO. 517. ERYTHROSIN. 



GREEN TABLE NO. 692. INDIGO SULPHO ACID. 



MARKET QUALITY OF THE SEVEN PERMITTED COLORS. 



That the quality of the lots of the seven permitted colors of Food 

 Inspection Decision No. 76 offered on the markets of the world after 

 the issuance of that decision was no better than that of the lots just 

 reported, if as good, appears from the paper of E. G. Kohnstamm enti- 

 tled, "Certified Food Colors: The Difficulties in the Way of their 

 Manufacture," presented to the Seventh International Congress of 

 Applied Chemistry held in London, May and June, 1909, and pub- 

 lished in abstract form. This abstract reads as follows: 



The coal-tar colors permitted under the food and drugs act of the United States arc 

 seven in number, which must be in a high state of purity. The author states that none 

 of the colors on the markets of the world, at the time of testing, would meet these 

 requirements. 



