Supply STPP - Sodium Tripolyphosphate

Supply STPP - Sodium TripolyphosphateSodium tripolyphosphate
CAS No: 7758-29-4
certificate: ISO9001...
Supply STPP - Sodium TripolyphosphateSodium tripolyphosphate
CAS No: 7758-29-4
certificate: ISO9001...

Molecular formula:
Na
5
P
3
O
10
Molecular Weight:
367.86
Standard executed :
GB/T9983-2004(technical grade)
QB1034-91(food grade)
CAS Number:
7758-29-4
Properties:
White powder; Melting point 622°C; Easily soluble in water; It has got salient chelating capacity to ions of Ca and Mg etc.
and can soften hard water to make suspension solution become into clear solution;
It has got weak alkalinity but no corrosiveness. 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/cm
3
and high density 0.66-0.9g/cm
3
. This product has two crystalline forms, namely Type I (high temperature type) and
Type II (low temperature type). The chemical properties of the two types are the same, and the
difference between them lies in the thermostability, hygroscopicity, solubility and hydration heat
when dissolving .
Uses:
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 suspension
solutions 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.
Guaranteed Technical Specifications :
NO.
Specifications
Industrial Grade
Food Grade
1
AssayNa5P3O10 % ≥
94.0
95.0
2
P2O5 % ≥
57.0
57.0
3
Water Insoluble Matter %≤
0.1
0.05
4
Iron(Fe) %≤
0.01
0.01
5
PH value(1%water solution)
9.2-10.0
9.5-10.0
6
Heavy Metal (as Pb) %≤
0.002
0.001
7
Arsenic (As) %≤
0.0004
0.0003
8
Fluoride (F) %≤
0.004
0.003
9
Whiteness %≥
90.0
90.0

Packing:
In polyethylene film bag with outer polypropylene woven bag, 25kg, 50kg, big sack bag
or as required by the customer