IMS Oxygen Bleach Toilet Bowl Deodorizer Shelf Display. With the unique, dual-action cleaning power of oxygen- bleach and detergents, IMS now offers Oxygen-Bleach Bowl Deodorizers. Unlike other bleach products that can be toxic and hazardous to the environment and your health, IMS Oxygen-Bleach Bowl Deodorizer is naturally phosphate-free, environmentally friendly and effective enough to treat the toughest stains. It's rich, citrus fragrance is water-activated, renewing itself with every flush.