Sodium Tripolyphosphate 94%, commonly abbreviated as STPP 94%, is an inorganic compound and is classified as a builder that can soften, buffer or emulsify formulations. STPP 94% is a solid and is a powder in form. One of the most common end-use applications for STPP 94% is in detergents since it will bind to both calcium and magnesium ions that will allow for the surfactant system to perform at optimal levels.