SODIUM TRIPOLYPHOSPHATE or STPP is an inorganic compound. It is the sodium salt of the polyphosphate 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.
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Chemical name
|
Pentasodium triphosphate |
|
Formula
|
Na₅P₃O₁₀ |
|
Molar mass
|
367.8 g/mol |
|
CAS / EINECS
|
7758-29-4 / 231-838-7 |
|
Code
|
2835310000 |
Photo
Specification
Product code
|
1011
|
1014
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Appearance
|
Granular anhydrous STPP
|
White free flowing powder
|
Content of (P2O5)
|
min. 55,5 %
|
min. 54,5 %
|
Content of Na5P3O10
|
min. 94 %
|
min. 94 %
|
Phase I content
|
–
|
50 – 70 %
|
Hunter colour meter L
|
min. 90 %
|
min. 95 %
|
Bulk density
|
900 – 1300 g/l
|
1000 – 1200 g/l
|
Particle size composition
|
On sieve 1,000 mm
(1000 microns)
max. 15 %
|
On sieve 425 microns
(Tyler 35 mesh or equivalent)
max. 5,0 %
|
|
|
On sieve 0,250 mm
(250 microns)
min. 90 %
|
On sieve 150 microns
(Tyler 100 mesh or equivalent)
min. 75 %
|
Packing
|
- 1000 kg big bags
- 25 kg bags on pallets
pallet 100x120 cm
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- 1000 kg big bags
- 25 kg bags on pallets
pallet 100x120 cm
|
|
|
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All of the above
results are based on the analysis of a composite sample. Individual samples may fall outside the
specified standard.
Packing
| 1011 |
1014 |
|
 |
Application
- detergent industry
- ceramics
- leather tanning
- flame retardant
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