Key attributes
Industrial grade 68% CAS 10124-56-8
Food grade 68% CAS 10124-56-8
Molecular formula (NaPO3)6 Molecular weight: 611.77
Industrial grade COA meets HG / T2519-2017 standard:
| Items for detecting and analyzing | Standard value |
| Total phosphate P2O5 ≥ | 68% |
| Inactive phosphate P2O5 ≤ | 7.5% |
| water insoluble ≤ | 0.05% |
| Fluoride (as F) ≤ | 0.05% |
| Ph Value | 5.8-7.3 |
| Solubleness | Need qualified |
| average degree of polymerization | 10-16 |
Structural characteristics and action mechanism
(1) Aggregate structure
Sodium hexametaphosphate is not a simple "hexamer", but a cyclic or chain polymer composed of 10 to 20 PO₃⁻ units. This structure endows it with:
High charge density: It can strongly adsorb metal ions.
Molecular flexibility: It can stretch in solution, enhancing the dispersion effect.
(2) Mechanism of Action
Chelating effect: It softens water quality by forming stable and soluble complexes with oxygen atoms such as Ca²⁺ and Mg²⁺.
Colloid protection: Adsorbed on the surface of particles, forming an electrostatic barrier to prevent agglomeration (such as stabilizing ceramic slurry).
Corrosion inhibition function: Forms a protective film on the metal surface to inhibit oxidation.
2. Special Performance and advantages
High-temperature stability
It is stable below 80℃ and suitable for heat-processed foods (such as canned foods and high-temperature sterilized beverages).
It will gradually hydrolyze into orthophosphate when the temperature exceeds 100℃, and the process temperature needs to be controlled.
(2) Synergistic enhancement
When compounded with STPP (sodium tripolyphosphate), it can enhance the decontamination power of detergents.
It can be used together with carrageenan and konjac gum in food to improve the gel strength.
(3) Environmental protection compatibility
Although it contains phosphorus, it can be removed by chemical precipitation in sewage treatment, and it is easier to control eutrophication than nitrogen-containing additives.
Some industries adopt low-phosphorus alternative solutions, but SHMP is still irreplaceable in the treatment of high-hardness water.
Main functional characteristics
(1) Excellent chelating ability
Sodium hexametaphosphate has a strong chelating ability for divalent metal ions such as Ca²⁺, Mg²⁺, Fe²⁺, etc., which can soften hard water and prevent the formation of scale.
(2) Dispersion and suspension effects
It can effectively disperse solid particles and prevent agglomeration, and is widely used in industries such as ceramics, pigments, and detergents.
(3) pH buffering effect
Its aqueous solution is weakly alkaline and can be used to adjust the pH of the system and maintain stability.
(4) Food processing performance
As a food additive (E452i), it can improve the texture of food, prevent protein denaturation and retain moisture (such as in meat and seafood processing).
It can prevent the precipitation caused by metal ions in beverages.
(5) Anti-corrosion effect
In industrial water treatment, it can inhibit the corrosion of metal pipes and equipment.
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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SHMP 68% Sodium Hexametaphosphate Important Functional Additives Images
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