P&G Purifier of Water is a powder which contains both coagulants and a timed-release form of chlorine. It is sold in single packets designed to treat 10 litres of water. The product uses coagulation and disinfection to remove turbidity and pathogens from water. When added to water, the coagulant first helps the suspended particles join together and form larger clumps, making it easier for them to settle to the bottom of the container. Then chlorine is released over time to kill the remaining pathogens. The treated water contains free chlorine residual to protect against recontamination.