1. The title resin has been prepared by Friedel-Crafts acylation followed by bromination and amination. The method avoids the utilization of cancerogenic chloromethyl methyl ether.

2. The organic dye of the invention has fast response to laser and excellent photo-thermal stability, can effectively replace cancerogenic azo dye, and has extensive application prospect.

3. Indicate epidemiology investigation , confirm on the grounds of international sampling investigation, major part in the cancerogenic patient who has a smoke is a passive smoker.

4. Toxicity tastes toxicity originally extremely low , milk does not resist , there is no deliver irregular , cancerogenic , inherit toxicity and immune toxicity.

5. WHO said yesterday that they have taken measures to control the degree of potential human cancerogenic hazard of the rich acrylamide contained in the fried food.