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It is a glassy phosphate with NA2O/P2O5 molecular ratio close to 1. It used to be called "Graham" salt. It was discovered by Graham in 1832. He heated the salt obtained by heating and dehydrating sodium dihydrogen phosphate, heated at its melting point (625°C), and rapidly cooled the melt, and prepared the hygroscopic Granham salt.

【Basic information】

Chinese name

Sodium hexametaphosphate, sodium hexametaphosphate

Molecular formula


Foreign name


CAS number



Sodium phosphate glass body, Graham's salt

English abbreviation



Mainly used in food and industrial industries. Among them, the food industry applications are mainly:

·Sodium hexametaphosphate is used in meat products, fish sausages, ham, etc., which can improve water holding capacity, increase adhesion, and prevent fat oxidation;

·Used in soybean paste and soy sauce to prevent discoloration, increase viscosity, shorten fermentation period, and adjust taste;

·Used in fruit drinks and refreshing beverages to increase the juice yield, increase the viscosity, and inhibit the decomposition of vitamin C;

·Used in ice cream can increase the expansion capacity, increase the volume, enhance the emulsification to prevent the destruction of the paste, and improve the taste and color;

Used for dairy products and beverages to prevent gel precipitation;

·Adding to beer can clarify the liquor and prevent turbidity;

·Used in beans, canned fruits and vegetables to stabilize natural pigments and protect food color;

·The aqueous solution of sodium hexametaphosphate is sprayed on the cured meat to improve the corrosion resistance.

The industrial sectors are mainly:

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

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

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

Used as a food quality improver in the food industry, used in canned food, fruit juice drinks, dairy products, and soy milk. It can be used as Ph regulator, metal ion chelating agent, adhesive and expansion agent. Used in canned beans, fruits and vegetables, it can stabilize natural pigments and protect the color of food; used in canned meat can emulsify fat and keep the texture uniform; used in meat food can improve water retention and prevent the fat in meat from deteriorating. Adding to beer can clarify the liquor and prevent turbidity.

Used as water softener for boiler water and industrial water (including dye production water, titanium dioxide production water, printing and dyeing slurry and dyeing water, cleaning color film copy water, and chemical water, medicine, reagent production water, etc.), industrial circulating cooling water Water treatment agent; also used as corrosion inhibitor, flotation agent, dispersant, high temperature binder, dyeing auxiliary, metal surface treatment, rust inhibitor, detergent auxiliary, cement hardening accelerator. Coated paper production is used as a slurry diffusing agent to improve penetration. It is also used in washing utensils and chemical fibers to remove iron ions in pulp. In the petroleum industry, it is used for rust prevention of drill pipes and for controlling the viscosity of mud during oil drilling.

Mainly used in boiler water softener, printing and dyeing bath water softener and paper making diffuser. It is also used as corrosion inhibitor, flotation agent, dispersant and high temperature binder. Others are used for washing utensils and chemical fibers to remove iron from pulp. Also used for soil analysis.

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