Chemicals Listed Effective June 11, 2004 as Known to the State of California to Cause Cancer: 3,3'-dimethoxybenzidine-based dyes metabolized to 3,3'-dimethoxybenzidine, 3,3'-dimethylbenzidine-based dyes metabolized to 3,3'-dimethylbenzidine, ethylbenzene, propylene glycol mono-t-butyl ether, and thiouracil