The washing often included chlorine bleach or sodium hydrosulfite. Chlorine dioxide has been used to bleach flour. The chickenpox virus is susceptible to disinfectants, notably chlorine bleach (i.e., sodium hypochlorite). At home, this can be done effectively with a diluted chlorine bleach. Cleaning surfaces with a chlorine bleach solution prevents the disease from spreading from subsequent contact. Environmental decontamination is typically accomplished with hypochlorite (e.g. bleach) or phenolic disinfectants. The benefits of chlorine bleach include its inexpensive and fast acting nature. A dilute solution of potassium permanganate is an effective melanin bleach. Higher concentrations are used for hair bleach and teeth whitening. In 1970, Clorox introduced Clorox 2 all-fabric bleach. Waste water is treated with bleach or another antimicrobial agent. Ammonium persulfate is a standard ingredient in hair bleach. She appeared in television commercials for eKara, Pepsi and Clorox Bleach. Boron as sodium perborate is used as a bleach. Romania decided to bleach their hair before the match.