Sodium Trimetaphosphate(also called STMP) is a metaphosphate of sodium with a formula of Na3P3O9. The CAS No. of sodium trimetaphosphate is 7785-84-4,while the EINECS No. is 232-088-3. It is a colorless or white crystal that finds specialized applications in food and construction industries. Sodium trimetaphosphate is also used as a raw material of detergent and drying bleach,etc. CAS No.: 7785-84-4 Other Names: Trisodium Trimetaphosphate,STMP MF: Na3P3O9 EINECS No.: 232-088-3 Grade Standard: Industrial Grade Purity: 68% min Appearance: White powder Application: Water Treatment,Detergent,food,Gypsum Board P2O5: 68% min As: 0.0003% max Heavy Metal(As Pb): 0.001% max Fluoride: 0.005% max PH(1% solution): 6.0-9.0 Insoluble: 0.1% max Molecular Weight: 305.89 25kg/bag