25kg Per Bag CAS 7758-29-4 Sodium Tripolyphosphate for Water Treatment
Key attributes
Molecular formula: Na5P3O10
Molecular weight: 367.86
Industrial grade CAS 7758-29-4
Industrial grade products & COA meets GB/T 9983-2004 standard:
| Items for detecting and analyzing | Standard value |
| Main content: sodium tripolyphosphate ≥ | 96.0% |
| Phosphorus pentoxide P2O5≤ | 57.0% |
| water insoluble≤ | 0.10% |
| Fluoride (as F) ≤ | 0.007% |
| Ph Value (1%) | 9.2-10.0 |
| Whiteness ≥ | 90 |
Food grade CAS 7758-29-4
Food grad products & COA meets QB 1034-1991standard:
| Items for detecting and analyzing | Standard value |
| Main content: sodium tripolyphosphate ≥ | 95.0% |
| Phosphorus pentoxide P2O5≤ | 57.0% |
| water insoluble≤ | 0.05% |
| Fluoride (as F) ≤ | 0.003% |
| Heavy martial (as Pb) ≤ | 0.001% |
| Arsenic (as As) ≤ | 0.0003% |
| Sulphate (as SO4)≤ | 0.4% |
| Chlorine (as Cl) ≤ | 0.025% |
| Ph Value (1%) | 9.5-10.0 |
| Whiteness ≥ | 85 |
References: Riel Chemical Lab1&2, National public service platform for standards information.
Sodium tripolyphosphate/ STPP
Industrial grade 96% CAS 7758-29-4
Food grade 85% CAS 7758-29-4
Molecular formula Na5P3O10
Molecular weight 367.86
【 Performance Characteristics 】
White granular or powder, showing a density of 0.35-0.90G/CM3, melting point 622 degrees Celsius.
It is easily soluble in water, the aqueous solution is alkaline, and the PH of 1% aqueous solution is 9.7.
It is gradually hydrolyzed into phosphite in water, and has good ionic ability of metal complexation.
It can be complexed with calcium/magnesium/iron and
other metal ions to produce soluble complexes. It softens hard water. As a kind of inorganic surfactant,
it has some properties of organic surfactant.
【 Purpose 】
Mainly used for synthetic detergent as an additive/soap agent and to prevent bar soap grease precipitation and
frosting. It has a strong emulsifying effect on lubricating oil and fat, and can be used to
adjust the PH value of buffer soap liquid, industrial water softener/tanning and
pre-tanning agent/dyeing agent/paint/kaolin/magnesium oxide/calcium carbonate and
other industries to prepare suspension as a dispersant, drilling mud dispersant,
and paper industry as an anti-oil agent.
Is sodium tripolyphosphate good for water treatment
1.The role of sodium tripolyphosphate in water treatment
Scale inhibitor
It can chelate with metal ions such as calcium and magnesium in water, preventing scaling (such as in boilers and cooling water systems), and is especially suitable for high-temperature or high-hardness water quality.
Corrosion inhibitor
It forms a protective film on the surface of metal pipes or equipment to slow down corrosion (often used in combination with other corrosion inhibitors).
Dispersant:
Prevent the deposition of suspended particles and keep the system clean (such as industrial circulating water, pretreatment of reverse osmosis membranes).
2. Advantages vs. Limitations
Advantages:
Low cost and high cost performance;
It has strong chelating ability and is suitable for water with medium and low hardness.
It has both corrosion inhibition and dispersion effects.
Limitations:
Environmental protection issues: It contains phosphorus and is prone to cause eutrophication of water bodies (its use is restricted in some countries/regions).
High-temperature failure: Decomposition may occur when the temperature exceeds 80℃, reducing the effectiveness.
Dosage control is required: Excessive use may leave residues and affect subsequent processes.
3. Suggestions for applicable scenarios
Recommended for use
Industrial circulating cooling water system
Water treatment for small boilers
Wastewater treatment without strict phosphorus restriction (such as the pretreatment stage).
Not recommended for use
Environmentally friendly areas with strict phosphorus bans;
High-temperature (>80℃) or extremely high-pressure systems;
Drinking water treatment (must be food-grade and meet safety standards).
FAQ
1.What is your payment term?
We can accept T/T and L/C at sight as payment term.
2.Are you able to deliver on time?
Of course! we specialised in this line for many years,
many customer make a deal with me because we can deliver the goods on time and keep the goods top quality!
3.Do you provide free sample?
Yes, we can provide free sample . You only need to take the express fee.
4.How about the price?Can you make it cheaper?
We always take the customer’s benefit as the top priority.
Price is negotiable under different conditions, we are assuring you to get the most competitive price.
5.Can I visit your company and factory in China?
Sure. You are very welcomed to visit our company in Weifang, China.
(We will have someone responsible for picking up and dropping off at Weifang Airport)
6.What if there is a quality problem?
We have a professional and perfect after-sales service team, timely for you to deal with all problems.
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