MASURF TEA-SI is a Triethanolamine phosphate ester Scale Inhibitor, made from a reaction between triethanolamine and polyphosphoric acid, partially neutralized with sodium hydroxide.

MASURF TEA-SI is used to impart corrosion and scale inhibition properties to water recirculating systems such as air conditioning cooling towers, secondary oil recovery operations, boiler equipment, and other water treatment applications where scale build-up can be a problem.