Properties And Uses of Sodium Hexametaphosphate

Sodium hexametaphosphate, also known as sodium polyphosphates, sodium tetrapolyphosphate, Graham's Salt is transparent glass flake or powdery in appearance.

Chemical Properties

Melting point 616℃ (decomposition), relative density 2.484gcm3 (20℃), easily soluble in water but insoluble in organic solvents. Colorless transparent glass flakes or white granular crystals. It has strong hygroscopicity, and it can gradually absorb moisture when exposed to the air and become a viscous gel. It can form soluble complexes with metal ions such as calcium and magnesium.

The neutralization reaction is carried out by soda ash or caustic soda solution and phosphoric acid. After completion, it will continue to be heated to 250°C to generate sodium metaphosphate, and then heated to 620°C to melt and polymerize into crystals. After quenching, pelletizing (prepared by pressing. Food grade six Sodium metaphosphate needs to undergo purification treatments such as arsenic removal and heavy metal removal after the neutralization reaction is completed, and then heated and roasted. It is used to make water treatment agents, corrosion inhibitors, metal surface treatment agents, cement hardening accelerators, Coated paper slurry diffusion agent and oil drilling, etc. Food grade, mainly used as quality improver, chelating agent, fermentation leavening agent, pH adjuster, etc.

Applications of Sodium Hexametaphosphate

It can be heated with sodium fluoride to prepare sodium monofluorophosphate and sodium hexametaphosphate. It can be used in meat products, fish sausages, ham, etc., can improve water retention, increase adhesion, and prevent fat oxidation; used in soybean paste and soy sauce can prevent discoloration It can increase the viscosity, shorten the fermentation period, and adjust the taste; used in fruit drinks and refreshing drinks, it can 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, and enhance the emulsification prevention Destroy the paste to improve the taste and color; used in dairy products and beverages to prevent gel precipitation; added to beer to clarify the liquor and prevent turbidity; used in beans, canned fruits and vegetables to stabilize natural pigments and protect food color. In addition, the aqueous solution of sodium hexametaphosphate is sprayed on the cured meat to improve the antiseptic performance. Sodium hexametaphosphate can also be used as a water softener in industrial production, such as dyeing and finishing. It plays a role in softening water and is mainly used as a water softener, boiler detergent and cleaning agent. Sodium hexametaphosphate is a multivalent integrator and is widely used in industry, including as a food additive. Sodium carbonate can be added to sodium hexametaphosphate to increase its pH to 8.0-8.6, which can be used as hard water softener and cleaning agent.

Sodium Hexametaphosphate Safety

Food-grade sodium hexametaphosphate contains traces of heavy metal lead, etc., as well as arsenic. Arsenic can cause systemic chronic poisoning mainly due to skin depigmentation, coloration, keratinization and cancer; food-grade hexametaphosphate Sodium also has a certain content of fluoride. Low concentrations of fluoride can cause chronic poisoning and skeletal fluorosis, reduce calcium in the bones, and lead to bone sclerosis and osteoporosis. However, these hazards are only possible in the case of long-term exposure. The country has established the minimum standards for these substances in food-grade sodium hexametaphosphate after a large number of animal experiments and actual conditions, a toxic side effect! To know more about SHMP Chemical and other phosphorus chemicals, visit our website(CHEMATEPHOSPHATES.com)