11. It is used as an industrial disinfectant, bleaching agent and a reagent in organic synthesis. 12. The production of chlorine and hypochlorite bleaching agents was a large consumer of manganese ores. 13. This is used in polymerisations, as a flour bleaching agent and as a treatment for acne. 14. As a food additive, azodicarbonamide is used as a flour bleaching agent and a dough conditioner. 15. A bleaching agent would affect only the carotenoids in the flour; a maturing agent affects gluten development. 16. Acetone peroxide is are used as a flour bleaching agent to bleach and " mature " flour. 17. -- Chlorine : A foul-smelling gas used as a bleaching agent in paper mills and chemical plants. 18. In some cases, dentists will make a customized tray to hold the bleaching agent for home use. 19. Many people who are not happy with their so-called yellow teeth have opted to use bleaching agents . 20. Most contain abrasive ingredients to scrub off stains on the tooth's outer layer; a few include bleaching agents .