Sodium Tripolyphosphate(STPP)
STPP or sodium triphosphate is an inorganic compound with formula Na5P3O10. STPP,Sodium Tripolyphosphate is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. Sodium tripolyphosphate is produced by heating a stoichiometric mixture of disodium phosphate, Na2HPO4, and monosodium phosphate, NaH2PO4, under carefully controlled conditions. Sodium tripolyphosphate stpp
STPP,Sodium Tripolyphosphate Food Grade
|
Item |
Standard |
|
Assay (%) (na5p3o10) |
95 min |
|
Appearance |
White granular |
|
P2o5 (%) |
57.0 min |
|
Fluoride (ppm) |
10max |
|
Cadmium (ppm) |
1 max |
|
Lead (ppm) |
4 max |
|
Mercury (ppm) |
1 max |
|
Arsenic (ppm) |
3 max |
|
Heavy mental (as pb) (ppm) |
10 max |
|
Chlorides (as cl) (%) |
0.025 max |
|
Sulphates (so42-) (%) |
0.4 max |
|
Substances not dissolved in water (%) |
0.05 max |
|
pH value (%) |
9.5 – 10.0 |
|
Loss on drying |
0.7% max |
|
Hexahydrate |
23.5% max |
|
Water-insoluble substances |
0.1% max |
|
Higher polyphosphates |
1% max |
STPP,Sodium Tripolyphosphate Tech Grade
|
Items |
Standards |
|
Assay (%) (na5p3o10) |
94%min |
|
Appearance |
White granular |
|
P2o5 (%) |
57.0 min |
|
Bulk density |
0.4~0.6 |
|
Iron |
0.15%max |
|
Temperature rise |
8~10 |
|
Polyphosphate |
0.5 max |
|
pH value(%) |
9.2 – 10.0 |
|
Ignition loss |
1.0% max |
|
20mesh through |
≥90% |
Storage: in dry, cool, and shaded place with original packaging, avoid moisture, store at room temperature.
Shelf Life: 48 months
Package:in 25kg/bag
delivery:prompt
1. What’s your payment terms?
T/T or L/C.
2. What’s your delivery time?
Usually we will arrange the shipment in 7 -15 days.
3. How about the packing?
Usually we provide the packing as 25 kg / bag or carton. Of course, if you have special requirements on them, we will according to you.
4. How about the validity of the products?
According to the products you ordered.
5. What documents you provide?
Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
6. What is loading port?
Usually is Shanghai,Qingdao or Tianjin.
