Sodium tripolyphosphate(STPP)
Technical specification
Chemical formula: Na5Р3O10
Appearance: white loose powder.
Application: in production of detergents, in water treatment – boiler feeding, in oil, glass and ceramic industries.
Physical and chemical parameters:
|
№ |
Item |
Norm | ||
|
High grade |
SK-10 |
SK low hydrated | ||
|
1 |
Mass share of P2O5, %, min |
57,0 |
56-58 |
56-58 |
|
2 |
Mass share of Na5P3O10, %, min |
94 |
94 |
94 |
|
3 |
Calcination losses, 105 °C, %, max |
- |
1,0 |
1,0 |
|
4 |
ROH
|
- |
- |
|
|
5 |
Mass share of 1st form STPP, %, max |
10 |
10 |
10-60 |
|
6 |
Mass share of Fe, %, max |
0,01 |
0,01 |
0,01 |
|
7 |
Mass share of Sodium pyrophosphate, %, max |
|
4 |
4 |
|
8 |
Total sodium orthophosphate & metaphosphate, %, max |
- |
2 |
- |
|
9 |
Mass share of insolubles in water, %, max |
0,10 |
0,1 |
0,1 |
|
10 |
pH of 1-% water solution |
9,7±0,3 |
9,7±0,2 |
9,2-10,3 |
|
11 |
Looseness, %, min |
30 |
- |
- |
|
12 |
Whiteness, %, min |
80 |
- |
- |
|
13 |
Granulometry,
|
|
|
|
|
|
0,25 mm, %, min |
97 |
- |
- |
|
|
0,5 mm, max |
- |
0,5 |
0,5 |
|
|
0,25 mm, max |
- |
3 |
3 |
|
|
0,071 mm, max |
- |
50 |
50 |
Package:
Bags, in bulk, special containers "Big Bag".
Marking:
Label with name, product quality, gross and net weight.
Transportation:
Railway box cars, sheltered deckers, covered auto transport.
Storage:
In closed storehouses, unlimited storage term.
index file generated on: Fri Jul 4 15:46:11 CEST 2014