Molecular formula: Na5P3O10

Molecular Weight: 367.86

CAS Number: 7758-29-4

Sodium tripolyphosphate(stpp),food grade , appearance is powder

Properties:

White powder; Melting point 622 °C ; Easily soluble in water; It has got salient chelating capacity to metal ions of Ca and Mg etc. and can soften hard water to make suspension into solution, alkalinity, without causticity . It is a surfactant, and has got outstanding emulsification to lubricants and fat. It has different bulk density, i.e. low density 0.35-0.5g/cm 3 , medium density 0.51-0.65g/cm3 and high density 0.66-0.9g/cm 3 . This product has two crystalline forms, namely phase I (high temperature phase) and phase II (low temperature phase). The chemical properties of the two phases are the same, and the difference between them lies in the thermostability, hygroscopicity, solubility and hydration heat when dissolving .

Application:

Used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; As an oil contamination resistance agent in paper production. In foodstuff industry it 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.

Indexes                      Industrial Grade                Food Grade

Na5P3O10                        94.0%Min                     94.0%Min

P2 O 5                             57.0%Min                     57.0%Min

Water Insoluble Matter      0.15%Max                     0.04%Max

Iron(Fe)                          0.015%Max                    0.006%Max

PH value (1% water solution)  9.2-10.0                    9.5-10.0

Heavy Metal (as Pb)                                              0.001%Max

Arsenic (As)                                                          0.0003%Max

Fluoride (F)                                                          0.003%Max

Whiteness                         92%Min                         92%Min

Ignition loss                            1.0                            /

density (g/cm3)                    0.35-0.9                   0.35-0.9

Phase I                                 10-30                       10-30

Packaging & Delivery:Packaging Detail:  25 KG , 50 KG , 1000KG woven bag lined with plastic bags