STPP [IDENTIFICATION] Sodium Tripolyphosphate (Industrial Grade) [CHEMICAL FORMULA] Na5P3O10 [SPECIFICATIONS] Item Internal Quality Control Index* Na5P3O10(Na5P3O10 Unit) % 96 min P2O5(P2O5 Unit) % 57 min Water Insoluble % 0.10 max Iron Content(Fe Unit) % 0.007 max PH(1% Water Solution) 9.2~10.0 White Content % 85 min Particle Size(Beneath 1.00mm Sieve) % 5.0 max *Tip: Customization is available.