Product Name Sodium Tripolyphosphate (STPP) Tech Grade H. S. Code 28353190 CAS No. 7758-29-4 Molecular Formula Na5P3O10 Molecular wt 367.86 Production standard GB/T9983-88 Na5P3O10 content (purity) % ¡à 94.00 P2O5 content % ¡à 56 Fe Content ¡à 70 ppm Water Insoluble % ¡à 0.10 Bulk Density g/ml 0.6 ~0.9 Phase I content % 5~40 Whiteness % 85 min pH value (1% water solution) 9.2 ~10.0 Loss on drying (500C ) % Residue on % 18 mesh 20 mesh 40 mesh 100 mesh Hydration speed (R. O. H) 1 min. 5 min. Volatile matter (105 C) % Appearance white powder Packing 25/1000/1100kg bags, PP bag with PE liner, 20~25mt/20FCL Properties and uses: White powder, mainly used as synthetic detergent, water-softening agent, dispersant of drilling mud and mineral floating, catalyst of organic synthesis.