Product Specifications
Product Description
Sodium triphosphate STP, also sodium tripolyphosphate (STPP), is an inorganic compound with formula Na5P3O10. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. Sodium tripolyphosphate is a white crystal powder with melting point at 622ºC. STPP is easily soluble in water. And aqueous solution appears acid. It is provided with remarkable chelating ability to some metal ions such as Ca2+ and Mg2+, etc. But it easily aborbs moisture or water.
Specification
| Index | Industrial Grade | Food Grade |
| Assay, % ≥ | 94.0 | 94.0 |
| P2O5 % ≥ | 57.0 | 57.0 |
| Water Insoluble Matter %≤ | 0.15 | 0.05 |
| Iron(Fe) %≤ | 0.01 | 0.01 |
| PH value (1% water solution) | 9.2-10.0 | 9.5-10.0 |
| Heavy Metal (as Pb) %≤ | -- | 0.001 |
| Arsenic (As) %≤ | -- | 0.0003 |
| Fluoride (F) %≤ | -- | 0.003 |
Particle Size Through 16 mesh sieve %≥ Through 35 mesh sieve %≥ Trough 100 mesh sieve %≥ | 95.0 90.0 40.0 | 95.0 90.0 40.0 |
| Whiteness %≥ | 90.0 | 90.0 |
Applications
- In food industry, Sodium tripolyphosphate is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It may also serves as a softener or densifier in foodstuff industry. - For industry use, it is tanning agent for leather making, auxiliary for dyeing. Additionally, it is used as an oil contamination resistance agent in paper production.
Package
It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.
Hefei TNJ Chemical Industry Co., Ltd., established in 2001, is a key chemical manufacturer and supplier in China.
In 2001, three young chemists from a local large state-owned chemical factory established TNJ Chemical by starting from producing PVP products. By taking advantage of technology innovation, TNJ made fast and steady development in PVP. Meanwhile, in order to further enhance comprehensive competence, TNJ begun to seek for products diversity and invested more chemical lines to meet market demands. Up to 2015, TNJ owns key products of more than 60 which covers four fields: Chemicals, Food, Pharmaceutical and Personal care.
Through over 15 years of development, TNJ has become an international and diversified modern chemical company. About 60% of our products are exported to overseas which turns over about 20 Million US dollars per year. In 2015, TNJ was awarded as the top 10 exporting giants in Anhui province.
TNJ always adheres to harmonious development. Beyond the economic success, TNJ focuses on environmental protection and social development. In TNJ, all aspects strictly comply with environmental protection standard and regulation set by State Environmental Protection Department of China. As a responsible company, TNJ contributes to social development by producing high-quality assured chemicals and creating more and more jobs. TNJ is also committed to charity annually including supporting students from poor families to continue education etc.
We believe in Better Chemicals, Better Future. We are on the way to become a responsible world-class chemical company through innovation and stable development.
