Гексаметафосфат натрия SHMP

Sodium hexametaphosphate SHMP: characteristics.

Registration number: CAS 10124-56-8.

Chemical formula: Na6[(PO3)6].

Sodium cyclohexophosphate belongs to inorganic salts, has the form of a white glassy powder, which is highly soluble in water and has pronounced hygroscopicity. Dissolution does not occur in organic solvents.

Preparation occurs by heating orthophosmonosodium phosphate, resulting in the formation of sodium acid pyrophosphate, after which heating occurs again, followed by rapid cooling, and the reaction product produces the necessary sodium hexametaphosphate.

In water, the hydrolysis reaction takes place to sodium trimetaphosphate and sodium orthophosphate; the reaction proceeds especially quickly in an acidic environment.

Scope of application:

• It is most often used either as a binder;
• As a dietary supplement E452i. Acts as an emulsifier;
• When a certain amount of sodium carbonate is added to the mixture, a type of SHMP is obtained, used to soften water and detergent compositions;
• Particle deflocculant in ceramic production;
• It is used as a reagent that destroys clay, which finds its application in soil analyses;
• As part of toothpastes, it helps protect against tartar and caries.

The substance is classified as moderately dangerous; large amounts of it should not be allowed to enter the body through the gastrointestinal tract, as this can affect the functioning of internal organs, even leading to bradycardia and hypercalcemia. In case of intoxication, you should consult a doctor. In case of contact with mucous membranes, it can cause severe irritation.

The powder should be stored in a dry place in a tightly closed container, preventing moisture from entering.