Sodium tetraphosphate

• CAS: 7727-67-5
• Catalog Number: ACM7727675
• Category: Main Products
• Molecular Weight: 469.83
• Molecular Formula: Na₆O₁₃P₄
• Synonyms: HEXASODIUM TETRAPHOSPHATE;SODIUM TETRAPHOSPHATE;SODIUM TETRAPOLYPHOSPHATE;QUADRAFOS;SODIUM TETRAPHOSPHATE 98%
• IUPAC Name: octasodium,dioxido(oxo)phosphanium
• Appearance: white powder
• Exact Mass: 499.75200

Case Study

Hydrolysis studies of sodium tetraphosphate

Crowther, Joan, and A. E. R. Westman. Canadian Journal of Chemistry 34.7 (1956): 969-981.

The hydrolysis rates of sodium tetraphosphate and sodium tetraphosphate (in the presence of tetraphosphoric acid) were measured at 65.5°C. The pH range was from 2.5 to 13.3. The tetrametaphosphate anion hydrolyzes to tetraphosphate, which in turn hydrolyzes to triphosphate* and orthophosphate, rather than pyrophosphate. Therefore, the terminal oxygen bonds in the tetraphosphate are attacked preferentially, rather than the central bonds. The reaction is first order and acid-catalyzed. The hydrolysis of the tetraphosphate is also base-catalyzed with a minimum solution of about pH 7.5. The hydrolysis rate of the tetraphosphate is greater than that of the triphosphate at the investigated hydrogen ion concentrations. The hydrolysis of sodium phosphate glass shows that higher polymers also preferentially attack the terminal oxygen bridges. However, trimetaphosphate is formed at the same time.
A phosphate mixture with tetraphosphate as the main component was used. This mixture can be obtained by heating sodium tetrametaphosphate [(NaPO3)4 4H2O] at 65.5°C for one hour in sufficient standard sodium hydroxide to break the ring. The resulting solution is a mixture of sodium tetrametaphosphate and sodium tetrametaphosphate containing a small amount of phosphate after appropriate dilution (0.17 by weight per liter of phosphorus). This solution is used as the starting material for the hydrolysis studies of sodium tetrametaphosphate. A sample (50 mL) of the phosphate solution is adjusted to within 0.1 unit of the desired pH by adding sodium hydroxide and/or cold filtered hydrochloric acid solution so that only a few drops are required. Since any residual sodium hydroxide is neutralized when the pH is adjusted to a lower value with hydrochloric acid, the sodium chloride content of the solution may be as high as 0.04 molar. The solution is then placed in a long and narrow tube and heated to 65.5°C in a water bath.

Antimicrobial Effect of Sodium Tetraphosphate

Tompkin, R. B. Journal of Food Safety 6.1 (1984): 13-27.

Shelf-stable pasteurized processed cheeses, cheese foods, and cheese sauces. The addition of relatively high levels of phosphates for emulsification also provides microbial stability; however, the minimum level for stabilization remains uncertain. It is becoming increasingly clear that phosphates are potentially valuable for improving the microbiological safety and stability of foods under certain conditions. Certain phosphates or phosphate mixtures are apparently more effective than others. With future research, it should be possible to further develop the potential value of phosphates.
It has been found that immersing fresh cherries in a 10% phosphate solution can retard mold spoilage during subsequent cold storage. This allows the cherries to be processed for longer periods without loss of quality. Sodium tetraphosphate is best suited for this purpose, followed by sodium tripolyphosphate and then tetrasodium pyrophosphate. Phosphates are used to retard microbial spoilage of fresh fish at refrigeration temperatures. This allows fresh herring to be stored longer before processing into pickled herring. An additional benefit of the process is improved eating quality of the finished product. The patent covers the use of 0.2-2% (w/w) of polyphosphoric acid, such as sodium tetraphosphate or sodium tetrapyrophosphate.

Custom Q&A

What is the molecular formula of Sodium tetraphosphate?

The molecular formula of Sodium tetraphosphate is Na6O13P4.

What are the synonyms of Sodium tetraphosphate?

The synonyms of Sodium tetraphosphate include Hexasodium tetraphosphate, Quadrafos, Tetraphosphoric acid, hexasodium salt, Sodium phosphate (Na6P4O13), and more.

What is the CAS number of Sodium tetraphosphate?

The CAS number of Sodium tetraphosphate is 14986-84-6.

What is the European Community (EC) Number of Sodium tetraphosphate?

The European Community (EC) Number of Sodium tetraphosphate is 239-073-0.

What are the computed properties of Sodium tetraphosphate?

The computed properties of Sodium tetraphosphate include its molecular weight (469.83 g/mol), hydrogen bond donor count (0), hydrogen bond acceptor count (13), rotatable bond count (4), exact mass (469.7675537 g/mol), monoisotopic mass (469.7675537 g/mol), topological polar surface area (234 Ų), heavy atom count (23), formal charge (0), complexity (363), isotope atom count (0), defined atom stereocenter count (0), undefined atom stereocenter count (0), defined bond stereocenter count (0), undefined bond stereocenter count (0), covalently-bonded unit count (7), and whether the compound is canonicalized (Yes).

What is the InChI of Sodium tetraphosphate?

The InChI of Sodium tetraphosphate is InChI=1S/6Na.H6O13P4/c;;;;;;1-14(2,3)11-16(7,8)13-17(9,10)12-15(4,5)6/h;;;;;;(H,7,8)(H,9,10)(H2,1,2,3)(H2,4,5,6)/q6*+1;/p-6.

What is the InChIKey of Sodium tetraphosphate?

The InChIKey of Sodium tetraphosphate is TVHALOSDPLTTSR-UHFFFAOYSA-H.

What is the physical description of Sodium tetraphosphate?

The physical description of Sodium tetraphosphate is not provided in the reference.

What is the computed by and release date of the IUPAC Name of Sodium tetraphosphate?

The IUPAC Name of Sodium tetraphosphate is computed by Lexichem TK 2.7.0, and the release date is not provided in the reference.

What is the computed by and release date of the Canonical SMILES of Sodium tetraphosphate?

The Canonical SMILES of Sodium tetraphosphate is computed by OEChem 2.3.0, and the release date is not provided in the reference.