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Industrial Grade Highly Purified Sodium Tripolyphosphate for Water Treatmen
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.
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 for use
1. Detergents and cleaners
Washing aid: Sodium tripolyphosphate is an important component in traditional washing powders and
detergents, which can soften water quality and enhance decontamination ability.
Dispersant: prevent dirt redeposition, keep clothes white.
Buffer: Maintain the pH value of the detergent and improve the cleaning effect.
2. Water treatment
Water softener: Sodium tripolyphosphate can be combined with calcium and magnesium ions in water to
prevent scale formation, and is used for industrial water treatment such as boiler water and cooling water.
Corrosion inhibitors: Protect metal pipes and equipment from corrosion.
3. Textile industry
Dye dispersant: in the dyeing process, to help the dye evenly dispersed, improve the dyeing effect.
Water softener: Used for textile dyeing water treatment to prevent calcium and
magnesium ions from affecting dyeing quality.
4. Paper industry
Dispersant: In the papermaking process, sodium tripolyphosphate is used to disperse fibers and
fillers to improve paper uniformity.
Retention agent: Improve the retention rate of fillers and fine fibers, improve paper performance.
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.