Sodium triphosphate (STPP) serves predominantly as a builder or water softener. (STPP indeed provides a number of functions including sequestration of water hardness compounds enabling surfactants to function effectively, pH buffering , dirt emulsification and prevention of deposition, hydrolysis of grease, and dissolving-dispersing dirt particles. In many geographies, it has been replaced in detergents, often by a mixture of alternative compounds who each provide one or more of these functions. From our homepage: www.hbwychem.com, you can learn more about product. Alice QQ:2595307676 SKYPE:weixiaodeyu0604 email:group06@hbwychem.com