1. Names and Identifiers
1.1 Name
sodium hexametaphosphate
1.2 Synonyms
EINECS 233-343-1hexametaphosphateMFCD00136045Sodium hexametaphoshpateSodium metaphosphate
1.3 CAS No.
10124-56-8
1.4 CID
131842947
1.5 EINECS(EC#)
233-343-1
1.6 Molecular Formula
H6Na6O18P6 (isomer)
1.7 Inchi
InChI=1S/Na.H6O18P6/c;1-19(2)13-20(3,4)15-22(7,8)17-24(11,12)18-23(9,10)16-21(5,6)14-19/h;(H,1,2)(H,3,4)(H,5,6)(H,7,8)(H,9,10)(H,11,12)
1.8 InChkey
FVFHXLBTPAOQHD-UHFFFAOYSA-N
1.9 Canonical Smiles
[Na].OP1(=O)OP(O)(=O)OP(O)(=O)OP(O)(=O)OP(O)(=O)OP(O)(=O)O1
1.10 Isomers Smiles
OP1(=O)OP(=O)(OP(=O)(OP(=O)(OP(=O)(OP(=O)(O1)O)O)O)O)O.[Na].[Na].[Na].[Na].[Na].[Na]
2. Properties
2.1 Density
2.181
2.1 Melting point
616 °C
2.1 Boiling point
1500℃
2.1 Refractive index
1.482
2.1 Precise Quality
617.7366010
2.1 PSA
387.19000
2.1 logP
3.28080
2.1 Appearance
White granular solid
2.2 Storage
Ambient temperatures.
2.3 Chemical Properties
It is colorless and transparent glass flake or white granular crystals. It is easily soluble in water but insoluble in organic solvents.
2.4 Color/Form
White
2.5 Water Solubility
Soluble in water. Insoluble in organic solvents
2.6 Stability
Stable. Keep dry.
2.7 StorageTemp
2-8°C
3. Use and Manufacturing
3.1 Agricultural Uses
Sodium metaphosphate is the salt of metaphosphoric acidhaving a molecular formula (NaPO3)n, where n rangesfrom 3 to 10 (for cyclic molecules) or may be much larger(for polymers). Cyclic molecules have alternate phosphorus andoxygen atoms in the rings and start with trimetaphosphate(NaPO3)3 to at least decametaphosphate. Sodium hexametaphosphate may be a polymer where n isbetween 10 and 20. Vitreous sodium phosphates have a Na2O:P2O5 rationear unity and are called Graham's salts. The averagenumber of phosphorus atoms in these vitreous glassesranges from 25 to infinity.
3.2 Methods of Manufacturing
Sodium hydroxide was added to the phosphoric acid and dehydrated at 540-580 ° C for about 2 h. The resulting solution was stable in the form of type I (Na: P = 5: 3); if the first heating to 620 ℃ melting, and then dehydrated at 550 ℃, and then cooled in the air to 100 ~ 150 '℃, the winner is metastable Ⅱ.
3.3 Usage
It can be used as a food quality improver in food industry, pH adjusting agent, metal ion chelating agents, dispersants, extenders, etc. It can be used as a kind of common analytical reagents, water softener, and also used for photofinishing and printing.It can be used as a water softener, detergent, preservative, cement hardening accelerator, fiber dyeing and cleaning agents; it can also used for medicine, food, petroleum, printing and dyeing, tanning, and paper industry.It can be used as texturizing agent; emulsifiers; stabilizer; chelating agent. It is less frequently for being used alone and is generally used in mixture with pyrophosphate and metaphosphate. The mixture is mainly used for ham, sausage, surimi such as the tissue improver for water retention, tendering and meat softening. It can also be used for prevention of crystallization of canned crab as well as dissolving agent of pectin.It can be used as the water softening agent of boiler water and industrial water (including water for the production of dyes, water for the production of titanium dioxide, water for printing and dyeing, and slurry mixing, water for cleaning color copy of the film, as well