STPP Chemical is formed by condensation of different sodium hydrogen phosphate molecules, which has a full name of sodium tripolyphosphate. Because there are five sodium stoms in its molecule(Na5P3O10), it is also known as pentasodium triphosphate. STPP powder is mostly used in synthetic detergents, and a few are used in the food processing industry and softening treatment of industrial water.
|Item||Industrial grade||Food grade|
|Main contents (Na5P3O10 )%≥||94.0||94.00|
|Phosphorus pentoxide（P2O5） %≥||56.5||57.0|
|Water insoluble %≤||0.15||0.10|
|PH value of 1% solution||9.2-10.0||9.4-10.0|
|Heavy metals, as Pb %≤||/||0.001|
|Arsenic,as As %≤||/||0.0003|
|Fluoride, as F %≤||/||0.003|
According to the structure and shape, it can be divided into white powdery anhydrous(Na5P3O10) and hexahydrate with the appearance of rectangular parallelepiped crystals(Na5P3O10.6H2O). Anhydrous stpp chemical also contains two crystalline forms, type I (high temperature) and type II (low temperature). They have the same chemical properties. The difference is that type I has higher thermal stability and hygroscopicity than type II, and both have different solubility and hydration heat when dissolved.
Food grade STPP can be used as water retention agent, quality improver, PH value regulator, metal chelating agent. Meat products. Improve water retention and coagulability, prevent fat oxidation. Beverages. Increase juice yield of juice drinks, as well as increase viscosity, inhibit vitamin C decomposition. Soy sauce. Prevent discoloration, increase viscosity, shorten fermentation period, adjust taste. Dairy products. Prevent gel precipitation. Ice cream. Improve swelling capacity, increase volume, enhance emulsification to prevent paste damage, improve taste and color. Cans. Stable natural pigment, maintain food color and luster. Beer. Clarify liquor, prevent turbidity, improve beer taste.
STPP detergent grade is always be used in various forms of detergents, such as, washing powder, washing liquid, soap.STPP has excellent washing performance, which is actually the combined effects of multiple functions, such as, soft water, dispersion, emulsification, anti-redeposition and PH buffering. Ant it also has strong decontamination ability in the condition that doesn’t add detergent.
STPP is a comprehensive metal complexing agent and inorganic builder.
STPP isn’t easy to absorb moisture, isn’t easy to hydrolyze, and its stability is better than sodium hexametaphosphate.
STPP has a synergistic effect on the detergency of surfactants.
STPP can be used in various water-phase processing processes in silk production.