Pyxis™ Laundry Brightener is a powerful liquid laundry bleach for all colors and fabric types. In solution, it oxidizes to help remove soil and organic matter, brightens the fabric and removes stains leaving only water as a by-product. Laundry Brightener may be added during the break and/or Detergent cycle. It is for use on all cotton, synthetic, and blended fabric types. Chlorine bleaches (hypochlorite solutions) effect tensile strength of cottons and will form insoluble complexes in the presence of metals such as iron (contained in the water) leaving stains in the fabric. Pyxis Laundry Brightener is not affected by metal traces and is safe on all fabrics.