In Brief: NTP Disperse Blue 1 carcinogen listing
This article was originally published in The Rose Sheet
Executive Summary
NTP Disperse Blue 1 carcinogen listing: National Toxicology Program to include Disperse Blue 1 in its Eighth Biennial Report on Carcinogens, a Congressionally mandated listing of known human carcinogens and reasonably anticipated carcinogens, NTP announced in an April 30 Federal Register notice. The ingredient, which is used in four coal tar hair dye products, according to FDA data, is "reasonably anticipated" to be a carcinogen, NTP states. The Cosmetic Ingredient Review expert panel reviewed the ingredient in 1994 and determined it safe when used in concentrations less than 1%. At the time of its review, CIR considered carcinogenicity data for rats, and noted that the tests involved ingestion of the ingredient and had caused a species of tumor that has not been reported in humans. The panel added that review of data for topically applied Disperse Blue 1 showed no carcinogenic link...