 The reaction of cyanethylcellulose with parabromodiazonium chloride produced and novel bromocontaining cellulosic material, MCPT, which can be dispersed into 1% waterborne polyurethane acrylate, WPUA. This dispersion stabilizes the material, allowing it to be used as a green dye for printing cotton, polyester, and cotton polyester blend fabrics. The fabric prints have shown improved color, robbing, light, washing, and perspiration fastness, UV blocking activity, and antibacterial activity. Additionally, molecular dynamic simulations of the protein structure have been performed to optimize the material's properties. This article was authored by Fatma N. L. Shell, Asma M. Faheem, and Sorsan Dakhry.