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A dye consisting of a diazotized dimethoxybenzidine nucleus that can have a wide variety of colors depending on the chemical groups attached at the diazo linkages. 3,3\'-Dimethoxybenzidine containing dyes are mainly used to color textiles, leather, rubber and paper. All 3,3\'-dimethoxybenzidine containing dyes are reasonably anticipated to be human carcinogens based on the fact that dimethoxybenzidine-based dyes are metabolized in vivo to form free 3,3\'-dimethoxybenzidine. 3,3\'-dimethoxybenzidine is possibly carcinogenic in humans. (NCI05)
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