Document a4x6QZo67ej9EbjEeX58mB8Dy

ckcc c H.F. Robertoa Sew Xork Office Pr. T.V. Iale Mellon Institute May 15, 1956 V- ' " Extraction Studies on VCCA-3400 Xellov 523 Pear Pr. Robertson* This is a comment on your letter of Hay 11 to Mr. J.V. Shilling on the above subject. I do not suggest any change in your request to him, but I think you should have some background information for future use. past week I had an opportunity to go over all the y.p.A. work on certified colors. Of the 15 out of 116 which they have studied recent ly, only FDfcC Xellov 5 has been found to shov no evidence of injurious action. Some colors will be removed from the list of those permitted in food uso. ft&G Xellov 5 has ths best chance of remaining on the Hat. Therefore, vhen we oen Ignore immediate urgencies, it mould be veil to thinir of thie color ae preferable to tome others. Ths y.p.A. controls lsad and arsenic content by testing and certifying each batch of color sold. Its present coneern for haxmlessneas refers to ths toxic effects of ths color Itself end its unavoidable organic Impurities. Eventually, the Act must be changed to permit F.D.A. to establish a tolerance for the amount of each oolor which may be in food, but this is Impossible now. Very truly Tours. ldf RECEIVED MAY * INDUSTRIAL MEDICAL & TOXICOLOGY DEPARTMENT ucc 063696