Cleans. Disinfects. Removes stains. Ounce for ounce, 33% more loads than Non-Ultra Bleach. When can I use Ultra Clorox Regular Bleach? For the cleanest, whitest whites, use Ultra Clorox Regular Bleach in every bleachable load. Most white fabrics and some colored fabrics can be safely washed with Ultra Clorox Regular Bleach. If uncertain about dye colorfastness, test fabric by applying one drop of solution made of 2 teaspoons Ultra Clorox Regular Bleach plus 1/4 cup water to hidden part of seam. (Be sure to check all colors). After 1 minute, blot dry. Not color change means article can be safely bleached. Avoid bleaching wool, silk, mohair, leather, spandex, and non-fast colors. Contains no phosphorus.