... ion 3.Sttp over15years manufacturer 4.Delivery time within15 Tech Grade STPP STPP 94%Chemical Formula: Na5P3O10Molecular Weight ... Mg 2+, can soften hard water, change suspension into solution, slightly alkaline, without causticity. Usage Used as main ... , as Fe %; 0.015 pH of 1% water solution 9.2-10.0 2. Food grade Main content, ... us for creating resplendence together. Our products Tech Grade STPP stpp