Sodium Tripolyphosphate (STPP), Tech Grade

1. Chemical name: Sodium Tripolyphosphate

Synonyms: Sodium tripolyphosphate, pentabasic; STPP

2. Molecular Formula: Na5P3O10

3. Molecular weight: 367.86

4. CAS Number: 7758-29-4

5. Property: White crystal powder, melting point is 622℃,easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+、Mg2+,can soften hard water, change suspension into solution, alkalescent, without causticity.

6. Specs.:

Sodium Tripolyphosphate (Na5P3O10): 94% min;

Phosphorus Pentoxide (P2O5): 57% min;

Bulk Density (g/cm3): 0.50~0.99;

Fe: 0.015% max;

Whiteness: 85% min;

Water Insoluble: 0.1% max;

PH Value (1% water solution): 9.2-10.0

7. Usage: Chiefly used as a water softener, sequestering agent, and defloculating agent in detergent industry. Also used in ceramic, mine, petroleum and paper manufacturing industries.

8. Packing: in 25kgs net plastic woven bag.

9. Storage and transport: It should be stored in a dry, ventilative and clean warehouse; kept away from moisture and heat, and stored separately from poisonous substances.