Other Food Additives

Product name: Sodium Hexametaphosphate It is a kind of sodium metaphosphate polymers. It is a colorless transparent glass-like solid or white powder with greater solubility but low dissolving rate in water. It can be used as a food quality improver in food industry, pH adjusting agent, metal ion chelating agents, dispersants, extenders, etc. It can also used for medicine, petroleum, printing and dyeing, tanning, and paper industry.

Attribute	Details
CAS Number	10124-56-8
Chemical Name	Sodium Hexametaphosphate
Formula	(NaPO3)6 or Na6P6O18
Molecular Weight	503.87 g/mol or 611.77 g/mol (varying sources)
Appearance	White powder or glass-like solid
Density	Approximately 2.181 g/cm³
Melting Point	616°C
Boiling Point	1500°C
Solubility	Soluble in water, though slowly; aqueous solution is acidic
pH (Aqueous Solution)	Acidic
Applications	Used as a food additive (e.g., water retainer), water softener, detergent builder, corrosion inhibitor, and in various industrial processes
Stability	Stable under normal conditions, but hygroscopic and may become sticky upon absorbing moisture
Storage	Store in a cool, dry place, away from moisture and incompatible materials
Safety	Generally recognized as safe for specific uses; refer to MSDS for detailed safety and handling instructions

Description

It, Glassy, occur as colorless or white, transparent platelets, granules, or powders. They belong to aclass consisting of several amorphous, water-soluble polyphosphates composed of linear chains of metaphosphate units (NaPO3)x for which x ≥ 2, terminated by Na2PO4- groups. They are usually identified by their Na2O/P2O5 ratio or their P2O5 content. The Na2O/P2O5 ratios vary from about 1.3 for sodium tetrapolyphosphate, for which x = approximately 4; through about 1.1 for Graham’s salt, commonly called sodium hexametaphosphate, for which x = 13 to 18; to about 1.0 for the higher molecular weight sodium polyphosphates, for which x = 20 to 100 or more. Glassy Sodium Polyphosphates are very soluble in water. The pH of their solutions varies from about 3.0 to 9.0.

Applications

It is mainly used in food and industrial industries.

1. The food industry applications are mainly:

1) Used in meat products, fish sausages, ham, etc., it can improve water holding capacity, increase adhesion, and prevent fat oxidation;

2) Used in bean paste and soy sauce to prevent discoloration, it can increase viscosity, shorten fermentation period, and adjust taste;

3) Used in fruit drinks and refreshing drinks, it can increase the juice yield, increase the viscosity, and inhibit the decomposition of vitamin C;

4) When used in ice cream, it can increase the expansion capacity, increase the volume, enhance the emulsification, prevent the paste from being damaged, and improve the taste and color;

5) Used in dairy products and beverages to prevent gel precipitation;

6) Adding to beer can clarify the liquor and prevent turbidity;

7) For beans, canned fruits and vegetables, it can stabilize natural pigments and protect food color;

8) The aqueous solution of sodium hexametaphosphate is sprayed on the cured meat to improve the antiseptic performance.

2. The main applications in the industrial sector are:

1) Sodium hexametaphosphate can be heated with sodium fluoride to produce sodium monofluorophosphate, which is an important industrial raw material;

2) Sodium hexametaphosphate is used as a water softener, if used in dyeing and finishing, it can play a role in softening water;

3) Sodium hexametaphosphate is also widely used as a scale inhibitor in water treatment industries such as EDI (Resin Electrodialysis), RO (Reverse Osmosis), and NF (Nanofiltration).

Specification

Appearance Colorless or white, transparent platelets, granules, or powders Assay of P2O5 60.0-71.0% Arsenic ≤3ppm Fluoride ≤0.005% Insoluble substances ≤0.1% Lead ≤4ppm Packing 25kg/ bag or as per requirement. Storage Store in a cool dry place.

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