Colgate peroxyl rinse colgate peroxyl mouth wash hydrogen peroxide 15 wv colgate peroxyl is an oral antiseptic mouth wash with a unique oxygenating cleansing action helps remove debris from hard to reach areas of the mouth the rapid release of oxygen has an antibacterial effect on anaerobic bacteria facilitates healing and alleviates discomfort caused by minor mouth and gum irritations such as gum inflammation soreness and mouth ulcers rapid release of oxygen helps remove debris antib